Thin-walled metal tube cutting tool

Abstract

This technical solution discloses a thin-walled metal tube cutting tool, which includes a cutting assembly and a housing assembly. The cutting assembly comprises a rotating wheel, a first support, a second support, a first bracket, a second bracket, a blade holder, a handle, a lever, a blade, a roller, and an elastic element. The rotating wheel is fixed to the first support, ensuring synchronous rotation. The rotating wheel has teeth that mesh with a gear set. The first and second supports are both C-shaped wall structures and are aligned and fixed together to form a support assembly. A spring groove structure is formed within the support assembly, and the elastic element is placed therein. The second support has a first column and a second column respectively designed at positions that engage with the rocker arm of the handle. The first and second columns engage with the rocker arm of the handle to adjust the angle of the rocker arm. The technical problem solved by this solution is to optimize the cutting system, making its structure simple and the linkage between its components relatively smooth.

Description

Technical Field

[0001] This invention relates to a power tool, specifically a thin-walled metal tube cutting tool, which can be powered by a plug-in or lithium battery. Background Technology

[0002] Thin-walled metal tube cutting tools are tools for cutting hollow thin-walled metal tubes. They have components such as a drive power supply, transmission components, cutting components, and electrical control components. Currently, there are many patent documents that disclose various structures of the tools. Among them, the component structures may be quite complex, such as the multiple structures of the tool holder for fixing the blade, which makes the assembly and transmission more complicated, thus affecting the use of the entire tool. Summary of the Invention

[0003] The purpose of this invention is to provide a thin-walled metal tube cutting tool. The technical problem to be solved is to optimize the cutting system so that its structure is simple and the linkage between its components is relatively smooth.

[0004] A thin-walled metal tube cutting tool, designed with a cutting component and a housing component;

[0005] The cutting assembly includes a rotating wheel, a first support, a second support, a first bracket, a second bracket, a blade holder, a handle, a lever, a blade, a roller, and an elastic element;

[0006] The rotating wheel is fixed together with the first support so that the first support and the rotating wheel rotate synchronously. The rotating wheel has teeth that mesh with a gear set.

[0007] The first and second supports are both C-shaped wall structures with notches, and are aligned and fixed together to form a support group. A spring groove structure is formed in the support group and an elastic element is placed therein. The second support is designed with a first column and a second column at the position where it cooperates with the rocker arm of the handle. The first column and the second column cooperate with the rocker arm of the handle to adjust the angle of the rocker arm.

[0008] The first and second brackets are both L-shaped structures and are aligned and fixed together to form a bracket assembly. The bracket assembly has a placement groove that cooperates with the rollers, and the bracket assembly also has a hole that connects to the handle shaft.

[0009] The tool holder has a longitudinally arranged rack that works in conjunction with the second lever wall to move the tool holder up or down, thereby pressing down the metal tube or facilitating the replacement of the metal tube.

[0010] The handle has a rocking wall and an inclined wall. The rocking wall is configured with a guide plate and a brake plate to adjust the angle of the handle. The inclined wall has an inclined surface that cooperates with the first lever wall to drive the lever to rotate.

[0011] The blade is fixed on the blade holder and arranged at intervals relative to the rollers, the intervals being the intervals for placing the metal tubes.

[0012] The housing assembly also includes a housing and a torsion spring; the guide plate is fixed inside the housing, and the surface of the guide plate that contacts the rocker wall is curved to ensure that the rocker wall fits against the first column; the brake plate is configured with the torsion spring, and the brake plate has two curved surfaces to ensure that the rocker wall fits against the first stop or to rotate the rocker wall to make the tool holder rise; the thin-walled metal tube cutting tool also includes the gearbox, and the gear box has a motor and gear set cooperating inside.

[0013] The second support has a movable hole, and the rocker arm of the handle is disposed in the movable hole.

[0014] The tool holder has a limiting part that cooperates with an elastic body; the end of the tool holder where the blade is disposed is a mounting part, which has a straight groove for placing the tool shaft.

[0015] The first and second bars are staggered and arranged in an intersecting configuration.

[0016] The lever has a round shaft portion, which is axially connected to the round shaft holes on the first bracket and the second bracket.

[0017] The blade has a compression spring above it, one end of which is fixed to the blade holder and the other end of which abuts against the blade shaft.

[0018] The elastic body is a first spring and a second spring, wherein the first support and the second support have spring grooves below them and are equipped with the first spring, the tool holder has spring grooves above it and is equipped with the first spring, and the lever has spring grooves below it and is equipped with the second spring.

[0019] The housing assembly is also equipped with a power observation window that displays the remaining power of the device in real time.

[0020] The housing assembly is also equipped with a movable transparent observation and tool changing window; the observation and tool changing window is located directly above the tool holder, and the support assembly has a tool changing chamber at the corresponding position.

[0021] The beneficial effects of this invention are as follows: By designing a first column and a second column on the first support, which move together with the guide plate and the brake plate, when cutting a metal tube is required, the entire cutting assembly rotates clockwise. The guide plate and the brake plate push the rocker wall towards the first blocking direction and into contact with the first column, thereby causing the inclined wall of the handle to push the second lever wall to engage with the rack of the blade holder, thus causing the blade holder to move downward, allowing the blade on the blade holder to begin cutting. When replacing the metal tube, the entire cutting assembly rotates counterclockwise. The curved surface on the brake plate causes the rocker wall to move away from the first column, thereby causing the inclined wall of the handle to push the second lever wall to disengage from the rack of the blade holder, thus causing the blade holder to move upward, thus moving the blade on the blade holder away from the metal tube and creating sufficient space for the new metal tube. The structure of the above-mentioned components is significantly optimized compared to existing cutting assemblies. Attached Figure Description

[0022] Figure 1 This is an overall schematic diagram of a thin-walled metal tube cutting tool;

[0023] Figure 2 yes Figure 1 A schematic diagram of the internal components of the tool;

[0024] Figure 3 yes Figure 2 A schematic diagram of the component from another angle;

[0025] Figure 4 This is a schematic diagram of the cutting components;

[0026] Figure 5 This is a schematic diagram of the cut component from another angle;

[0027] Figure 6 yes Figure 2 A schematic diagram showing the interior of the cutting assembly after the first support is removed;

[0028] Figure 7 This is an exploded view of the cutting component;

[0029] Figure 8 This is an exploded view of the cut component from another angle;

[0030] Figure 9 This is an exploded view of the cut component from another angle;

[0031] Figure 10 This is a diagram of the handle;

[0032] Figure 11 This is a schematic diagram of a knife holder;

[0033] Figure 12It shows that when the rocker arm is in contact with the first stop, it cuts the metal tube. The inclined wall of the handle drives the first lever wall to move, and the first lever wall drives the second lever wall to mesh with the rack on the tool holder.

[0034] Figure 13 This is a diagram showing the state when the tubing needs to be replaced. The handle's rocker arm moves away from the first gear, and at the same time, the second lever arm begins to disengage from the rack on the tool holder.

[0035] Figure 14 This is a schematic diagram showing that after the rocker wall is driven by the brake pads until the second bar wall is completely disengaged from the rack, the tool holder rises to make room for a new metal tube.

[0036] Figure 15 This is a schematic diagram showing that when the cutting component rotates clockwise, the rocker arm of the handle is guided and limited by the guide plate and the first column.

[0037] Figure 16 This is a schematic diagram showing the interaction between the rocker arm of the handle and the brake pad when the cutting assembly rotates clockwise.

[0038] Figure 17 This is a schematic diagram showing that when the cutting assembly rotates counterclockwise, the rocker side of the handle begins to be driven away from the first column by the brake pads.

[0039] Figure 18 This is a schematic diagram showing how the braking part of the brake pad engages with the second column when the cutting assembly rotates counterclockwise, facilitating the replacement of the metal tube.

[0040] Figure 19 This is a diagram of another knife holder;

[0041] In the picture

[0042] 11. Housing; 12. Turn button; 13. Guide plate;

[0043] 21. Brake pad; 211. Arc-shaped part; 212. Braking part; 22. Gear set; 23. Gearbox; 24. Torsion spring;

[0044] 31. Rotating wheel

[0045] 32. First support; 321. Stud;

[0046] 33. Second support; 331. Movable hole; 332. First column; 333. Second column;

[0047] 34. First support,

[0048] 35. Second stent

[0049] 36. Tool holder; 361. Mounting part; 3611. Straight groove; 362. Limiting part; 363. Rack;

[0050] 37. Handle; 371. Rocking wall; 372. Sloping wall;

[0051] 38. Lever; 381. First lever wall; 382. Second lever wall; 383. Round shaft section;

[0052] 391. Blade, 392. Cutter shaft, 393. Compression spring,

[0053] 310. Rollers,

[0054] 311. First spring, 312. Second spring,

[0055] 41. Mounting hole; 42. Square groove; 43. Spring groove; 44. Placement groove; 45. Round shaft hole; 46. Notch; 47. Tool changing chamber;

[0056] 5. Metal pipe;

[0057] 6. Battery level indicator window;

[0058] 7. Observation and knife changing window. Detailed Implementation

[0059] Please refer to Figures 1 to 19 The thin-walled metal tube cutting tool shown in the figure mainly consists of a housing assembly, a drive assembly, and a cutting assembly. The housing assembly is used to fix and support the other components, and the drive assembly is used to drive the cutting assembly to rotate and perform the cutting operation. In practical applications, the above components can be further optimized, such as by adding other components, replacing existing components with equivalent ones, or optimizing the structure or assembly relationship of the above components.

[0060] The housing assembly shown in the figure mainly includes a housing 11, a steering knob 12, and a guide plate 13. The housing 11 is composed of two housing parts joined together, and has a notch 46 at the end where the metal tube 5 is cut to facilitate insertion. The steering knob 12 can be a conventional component from existing cutting tools, and its function is to change the forward and reverse direction of the motor through signal switching, thereby adjusting the rotation direction of the cutting assembly. The guide plate 13 is fixed inside the housing 11 at the position shown in the figure, and its position where it mates with the rocker wall 371 is a curved structure, thus guiding the rocker wall 371 to the first column 332 so that it fits against the first column 332. The housing assembly is also equipped with a power observation window 6 to display the remaining power of the equipment in real time. At the same time, a flip-up transparent observation and tool changing window 7 is provided directly above the tool holder 36. This window allows the movement of the internal components to be seen, and it can be flipped to change the tool holder 36 at this position. The support assembly has a tool changing chamber 47 at the corresponding position, so that the tool holder 36 can be removed from the tool changing chamber 47. Other components of the aforementioned housing assembly are not described here as they are not closely related to the innovation of this case.

[0061] The drive assembly shown in the diagram mainly includes a gearbox 23, a gear set 22, a brake pad 21, and a torsion spring 24. The gearbox 23 contains a conventional linkage mechanism that works with the motor. The gear set 22 has multiple meshing gears that drive the rotating wheel 31 of the cutting assembly to rotate, thus rotating the entire cutting assembly. The brake pad 21 has an open-mouth-like structure; one side is fixed to the housing 11 by a torsion spring 24, one side has a shaft connection for easy swinging, and the other side has a triangular structure, forming an arc portion 211 and a braking portion 212. These two curved surfaces ensure that the rocker wall 371 is in contact with the first stop or allows the rocker wall 371 to rotate, causing the tool holder 36 to rise. The arc portion 211 is an arc structure, which ensures that it remains in contact with and presses against the first column 332 during clockwise rotation. The braking portion 212 ensures that the rocker wall 371 moves in the opposite direction during counterclockwise rotation. Figure 15 The direction marked by the middle arrow also blocks the second column 333, thus freeing up space to replace the new metal tube 5; the torsion spring 24 is a conventional component, and its function is to facilitate the reset of the entire brake pad 21.

[0062] The cutting assembly shown in the figure includes components such as a rotating wheel 31, a support assembly, a bracket assembly, a blade holder 36, a handle 37, a lever 38, a blade 391, a roller 310, and an elastic element.

[0063] The rotating wheel 31 has a toothed C-shaped structure with a notch 46, which facilitates meshing and assembly with the gear set 22 of the drive assembly, thereby driving the entire cutting assembly to rotate. The rotating wheel 31 is fixed to the first support 32 by screws and mounting holes 41, so that the first support 32 and the rotating wheel 31 rotate synchronously.

[0064] The support assembly consists of two components: a first support 32 and a second support 33, both of which are C-shaped structures forming a notch 46. The first support 32 has multiple mounting holes 41 and studs 321. The mounting holes 41 are for engaging with screws, and the studs 321 are for engaging with screws to achieve the mutual splicing and fixing of the second bracket 35. The first support 32, as shown in the figure, has a half-square groove 42 at its top position, which, when aligned with the second support 33, also has a half-square groove 42 to form a complete square groove 42 structure, facilitating the placement of the tool holder 36. The first support 32, as shown... The bottom position of the figure has a half spring groove 43 structure, which, together with the half spring groove 43 structure corresponding to the second support 33, forms a complete spring groove 43 structure to facilitate the placement of the first spring 311 as an elastic element, thus supporting the support assembly; at the same time, the top position of the first support 32, as shown in the figure, has a half spring groove 43 structure, which, together with the half spring groove 43 structure corresponding to the second support 33, forms a complete spring groove 43 structure to facilitate the placement of the first spring 311 as an elastic element, thus configuring the limiting part 362 of the tool holder 36. The second support 33 has an elongated movable hole 331 at the position where it mates with the handle 37 to facilitate rotation. Simultaneously, at the position where it mates with the rocker arm 371 of the handle 37, it has a first column 332 and a second column 333 with protruding structures. The first column 332 has an overall arc-shaped boss structure, with arc-shaped sides corresponding to the rocker arm 371. The second column 333 has an overall pointed boss structure, which facilitates fixing one end of the brake pad 21 at its bottom. The first column 332 and the second column 333, in conjunction with the rocker arm 371 of the handle 37, adjust the angle of the rocker arm. The second column 333 and the brake pad 21, when the cutting assembly reverses and retracts, play a positioning role for the cutting assembly, ensuring that the opening of the cutting assembly is precisely located at the opening of the housing, i.e., the notch 46. Figure 18 The location shown facilitates tool changing.

[0065] The support assembly comprises a first support 34 and a second support 35, both L-shaped structures spliced ​​together. The top surfaces of the first support 34 and the second support 35 at their bottoms mate to form a placement groove 44, facilitating the placement of two rollers 310. The bottom surface of the first support 34 corresponds to the spring groove 43 of the support assembly, used to place the first spring 311. The first support 34 has a spring groove 43 below its engagement position with the lever 38 for placing the second spring 312, which serves as an elastic element. Alternatively, in practical applications, the second spring 312 can be omitted. The first support 34 also has a circular shaft hole 45 corresponding to the circular shaft portion 383 of the lever 38 for mounting the circular shaft portion 383. The first support 34 also has mounting holes 41 for easy fixation with the second support 35. The second support 35 has a corresponding cavity (hole) structure at its engagement position with the rocker arm 371, allowing it to be configured together with the first support 34 to axially fix the handle 37.

[0066] The tool holder 36 in the figure has a structure resembling the number 7. From top to bottom, it comprises a mounting part 361, a limiting part 362, and a rack 363. The mounting part 361 is used to mount the blade 391. As shown in the figure, the mounting part 361 features a straight groove 3611 to facilitate the placement of the blade shaft 392. A U-shaped compression spring 393 is mounted above the blade shaft 392, behind the mounting part 361, ensuring that the compression spring 393 continuously presses down on the blade shaft 392 and the blade 391 during cutting. Please refer to [reference needed]. Figure 18 This design showcases a different style of tool holder 36, which employs a straight-plate compression spring 393 and is positioned in front of the mounting part 361. The limiting part 362 has a cross-shaped structure with a first spring 311 fitted on it, thus resetting it. The rack 363 has a conventional straight multi-tooth structure arranged longitudinally, and it engages or disengages with the second lever wall 382 of the lever 38 according to the rotation angle of the handle 37 to achieve a movable engagement, thereby driving the entire tool holder 36 to rise or fall, thereby pressing down the metal tube 5 or facilitating the replacement of the metal tube 5.

[0067] The handle 37 in the figure has an irregular shape, designed with a rocker wall 371 and an inclined wall 372. The rocker wall 371 works in conjunction with other components, such as the guide plate 13 and brake plate 21 on the housing assembly, to adjust the angle of the inclined wall 372 of the handle 37, thereby driving the lever 38 to rotate. The inclined wall 372, with its inclined surface, works in conjunction with the first lever wall 381 of the lever 38 to drive the entire lever 38 to rotate, which in turn drives the second lever wall 382 to rotate. The rocker wall 371 is a crank-like structure with a round cap-shaped top, and the inclined wall 372 is a structure with an inclined surface.

[0068] The lever 38 in the figure has a structure similar to a flying fork. It is designed with a first lever wall 381, a second lever wall 382, ​​and a round shaft 383. The first lever wall 381 is located on one side of the second lever wall 382 and is staggered from the second lever wall 382 while maintaining an intersecting configuration. The first lever wall 381 and the second lever wall 382 are both straight plate structures. The round shaft 383 is a round shaft structure. The two ends of the round shaft 383 are arranged in the round shaft holes 45 of the first bracket 34 and the second bracket 35, so that the lever 38 can rotate.

[0069] The blade 391, blade shaft 392, and compression spring 393 in the figure can all be existing components and assembled as shown in the figure, that is, one end of the compression spring 393 is fixed on the tool holder 36, and the other end is in contact with the blade shaft 392.

[0070] The roller 310 in the figure has two sets of aligned arrangement, with the blade 391 above it. The relative gap between the roller 310 and the blade 391 can accommodate the metal tube 5. The roller 310 remains in a rolling state when the blade 391 cuts the metal tube 5, thereby completing the cutting operation.

[0071] The elastic elements in the figure are the first spring 311 and the second spring 312. The diameter and specifications of the first spring 311 are larger than those of the second spring 312. The first spring 311 is disposed in the spring groove 43 below the first bracket 34 and the second bracket 35. The first spring 311 is disposed in the spring groove 43 above the limiting part 362 of the knife holder 36. The second spring 312 is disposed in the spring groove 43 below the lever 38.

[0072] The cutting and replacement process in this case is as follows:

[0073] Actuating the directional knob 12 causes the entire cutting assembly to move counterclockwise. At this time, the brake pad 21 drives the rocker arm 371 to move away from the first column 332, and the second lever wall 382 separates from the rack 363, causing the blade holder 36 to move upwards, thereby increasing the distance between the cutter and the roller 310, and placing the metal tube 5 into the aforementioned gap. Actuating the directional knob 12 again causes the entire cutting assembly to move clockwise. At this time, the rocker arm 371 moves towards the first column 332 under the action of the guide plate 13 and fits against the first column 332. This causes the second lever wall 382 to engage with the rack 363, causing the blade holder 36 to move downwards, thereby reducing the distance between the cutter and the roller 310, thus completing the cutting operation of the metal tube 5. After cutting is completed, place the metal tube 5 in as described above.

[0074] The specific embodiments described above are merely illustrative of the present technical solution and are not intended to limit the present technical solution. In the description of the present technical solution, it should be noted that terms such as "upper" and "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are only for the convenience of describing the present technical solution 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. Therefore, they should not be construed as limitations on the present technical solution.

[0075] Furthermore, in the description of this technical solution, it should be noted that, unless otherwise explicitly specified and limited, the terms "fixed" and "fitting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this technical solution according to the specific circumstances.

[0076] Although embodiments of the present technical solution have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present technical solution, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thin-walled metal tube cutting tool, characterized in that: The design includes cutting components and housing components; The cutting assembly includes a rotating wheel (31), a first support (32), a second support (33), a first bracket (34), a second bracket (35), a blade holder (36), a handle (37), a lever (38), a blade (391), a roller (310), and an elastic element; The rotating wheel (31) is fixed together with the first support (32) so that the first support (32) and the rotating wheel (31) rotate synchronously. The rotating wheel (31) has teeth that mesh with a gear set (22) for rotational engagement. The first support (32) and the second support (33) are both C-shaped wall structures with notches (46) and are aligned and fixed together to form a support group. A spring groove (43) structure is formed in the support group and an elastic element is placed therein. The second support (33) is designed with an outwardly protruding first column (332) and second column (333) at the position where it cooperates with the rocker wall (371) of the handle (37). The first column (332) and the second column (333) cooperate with the rocker wall (371) of the handle (37) to adjust the rotation angle of the rocker wall (371). The first bracket (34) and the second bracket (35) are both L-shaped structures and are aligned and fixed together to form a bracket group. The bracket group has a placement groove (44) that cooperates with the roller (310). At the same time, the bracket group is axially connected to the handle (37) to facilitate the rotation of the handle (37). The tool holder (36) has a longitudinally arranged rack (363), which is movably engaged with the second lever wall (382) of the lever (38) to make the tool holder (36) move up or down, thereby facilitating the replacement of the metal tube (5) or pressing down the metal tube (5). The handle (37) has a rocker wall (371) and an inclined wall (372). The rocker wall (371) is configured with a guide plate (13) and a brake plate (21) to adjust the angle of the handle (37). The inclined wall (372) has an inclined surface that cooperates with the first lever wall (381) of the lever (38) to drive the lever (38) to rotate. The blade (391) is fixed on the blade holder (36) and arranged at intervals relative to the roller (310), the interval being the interval for placing the metal tube (5).

2. The thin-walled metal tube cutting tool according to claim 1, characterized in that: The housing assembly also includes a housing (11) and a torsion spring (24); the guide plate (13) is fixed inside the housing (11), and the surface of the guide plate (13) in contact with the rocker wall (371) is curved to ensure that the rocker wall (371) fits against the first column (332); the brake plate (21) is configured with the torsion spring (24), and the brake plate (21) has two curved surfaces to ensure that the rocker wall (371) fits against the first column (332) or to rotate the rocker wall (371) to make the tool holder (36) rise; the thin-walled metal tube cutting tool also includes a gearbox (23), and the gearbox (23) has a motor and a gear set (22) working together.

3. The thin-walled metal tube cutting tool according to claim 2, characterized in that: The second support (33) has a movable hole (331), and the rocker arm (371) of the handle (37) is disposed in the movable hole (331).

4. The thin-walled metal tube cutting tool according to claim 3, characterized in that: The tool holder (36) has a limiting part (362) that cooperates with an elastic element; the end of the tool holder (36) where the blade (391) is configured is a mounting part (361), which has a straight groove (3611) for placing the tool shaft (392).

5. The thin-walled metal tube cutting tool according to claim 4, characterized in that: The first bar wall (381) and the second bar wall (382) are staggered and arranged in an intersecting configuration.

6. The thin-walled metal tube cutting tool according to claim 5, characterized in that: The lever (38) has a round shaft portion (383), which is axially connected to the round shaft holes (45) on the first bracket (34) and the second bracket (35).

7. The thin-walled metal tube cutting tool according to claim 6, characterized in that: The blade (391) has a compression spring (393) above it. One end of the compression spring (393) is fixed to the tool holder (36), and the other end is in contact with the tool shaft (392).

8. The thin-walled metal tube cutting tool according to claim 7, characterized in that: The elastic element is a first spring (311), wherein the first support (34) and the second support (35) have spring grooves (43) below which the first spring (311) is disposed, the limit part (362) of the knife holder (36) has spring grooves (43) above which the first spring (311) is disposed, and the lever (38) has spring grooves (43) below which the second spring (312) is disposed.

9. The thin-walled metal tube cutting tool according to claim 8, characterized in that: The housing assembly is also equipped with a power observation window (6) that displays the remaining power of the device in real time.

10. The thin-walled metal tube cutting tool according to claim 9, characterized in that: The housing assembly is also provided with a movable transparent observation and tool changing window (7); the observation and tool changing window (7) is located directly above the tool holder (36), and the support assembly has a tool changing chamber (47) at the corresponding position.

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