Pipe end face flattening device

Abstract

To provide a pipe end face flattening device that offers excellent operability and safety. [Solution] The device comprises a main body, a moving member, and a rotary cutting tool assembly 3. The main body comprises a cutting tool feed outer shell 11 and an inner cylindrical tube, the inner cylindrical tube being located inside the cutting tool feed outer shell, the moving member having at least one projection extending laterally from the end of the tube or provided at the end of the tube, the projection passing through at least one groove provided in the inner cylindrical tube and then being fitted into the helical groove provided in the cutting tool feed outer shell, the rotary cutting tool assembly comprising a head portion, a hollow rotating shaft extending from the rear end of the head portion, the hollow rotating shaft being fitted inside the moving member, the head portion protruding from the moving member and located inside the inner cylindrical tube, and a cutting tool 33 being held in place by the head portion. By rotating the cutting tool feed outer shell, the cutting tool is fed for cutting.

Description

Technical Field

[0001] The present invention relates to the technical field of hand tools, particularly to the technical field of pipe end flattening devices.

Background Art

[0002] The "end flattening" design of pipes mainly has the following several reasons and purposes. 1. Connection convenience: A smooth pipe end face can be easily welded, screwed, flanged, or fitted to other pipes, valves, or equipment, ensuring the tightness and firmness of the connection. If the pipe end face is inclined or not flat, gaps are likely to occur during connection, which may cause water leakage, gas leakage, and ultimately pressure imbalance and failures.

[0003] 2. Guarantee of sealing effect: Pipeline systems (especially systems for transporting gases or liquids) require high tightness. A smooth end face can ensure complete adhesion of gaskets and welding surfaces, prevent leakage, and improve the safety and stability of the entire system.

[0004] 3. Improvement of construction and maintenance efficiency: With the end flattening design, workers can easily measure, cut, align, and weld pipes on-site, reduce construction errors, and simplify maintenance and replacement.

[0005] 4. Ensure smooth fluid flow: If the pipe end face is uneven, there may be burrs or protrusions inside, which will affect the fluid flow, cause vortex, pressure loss, or accumulation of sediments, and affect the efficiency of the system.

[0006] However, conventional end-face flattening devices currently in general use, such as the "Precision Pipe End Cutting and Correction Machine" (Taiwan Design No. TW470592S), are used in combination with electric drills. Conventional end-face flattening devices are large and heavy, inconvenient to handle during installation, and cause significant strain on the operator's hands during prolonged use, resulting in very poor operability. Furthermore, the aforementioned precision pipe end cutting and correction machine can cause chips and debris to fly off during flattening, potentially injuring the operator. Therefore, existing conventional end-face flattening devices need improvement. [Overview of the project] [Problems that the invention aims to solve]

[0007] Therefore, in view of the problems with the conventional end-face flattening devices described above, the inventors of the present invention have diligently researched and developed the pipe end-face flattening device of the present invention. Accordingly, the main object of the present invention is to provide a pipe end-face flattening device with excellent operability. The second object of the present invention is to provide a pipe end-face flattening device with excellent safety. [Means for solving the problem]

[0008] To achieve the above objective, the pipe end face flattening device of the present invention comprises the following technical means. The device comprises a main body, a movable member, a rotating blade assembly, and a protective cover, the main body comprising a blade feed outer shell and an inner cylindrical tube, the inner cylindrical tube being mounted inside the blade feed outer shell and having at least one groove around the inner cylindrical tube, the inner wall of the blade feed outer shell having a helical groove corresponding to the groove, the blade feed outer shell being rotatable relative to the inner cylindrical tube, the movable member having at least one projection extending laterally from the end of the pipe or being provided at the end of the pipe, the movable member being fitted into the inner cylindrical tube, and At least one projection penetrates the at least one groove provided in the inner cylindrical tube and is then fitted into the helical groove provided in the tool feed outer shell. The rotary tool assembly comprises a head portion, from which a hollow rotating shaft extends to the rear end of the head portion, the hollow rotating shaft is fitted inside the moving member, the head portion protrudes from the moving member and is located inside the inner cylindrical tube, and a tool is held in place by the head portion. The protective cover is provided at the front end of the inner cylindrical tube and covers the tool, and the protective cover is provided with an insertion hole.

[0009] Two first bearings are provided between the tool feed outer shell and the inner cylindrical tube.

[0010] Two second bearings are provided between the moving member and the hollow rotating shaft provided on the rotating blade assembly.

[0011] The device further includes a grip portion, within which a motor and a battery module are provided. The motor is electrically connected to the battery module, and an extension shaft is provided, one end of which is connected to the rotor axis of the motor, and the other end of which is fitted into the hollow rotating shaft provided in the rotary cutting tool assembly.

[0012] The cross-section of the aforementioned extension axis is polygonal.

[0013] The protective cover further comprises a housing, two arc-shaped side wings, a circular cover body, and a knob, wherein the housing is provided as a coupling ring portion, with a first arc-shaped projection and a second arc-shaped projection extending from its front, the two arc-shaped side wings are pivotally mounted on two pivot points provided on the first arc-shaped projection, the knob is connected to the second arc-shaped projection and is used to fix the two arc-shaped side wings, the circular cover body is provided between the first arc-shaped projection and the second arc-shaped projection, and the insertion hole is provided on the circular cover body.

[0014] Multiple openings are provided in the two arc-shaped side wings.

[0015] Each of the two arc-shaped side wings is provided with at least one positioning column on its inner side, and the second arc-shaped projection is provided with a positioning hole corresponding to each of the at least one positioning columns.

[0016] The circular cover body is configured as two semicircular cover bodies, one of which is connected to the bottom screw of the knob, and each of the two semicircular cover bodies is provided with a flange, and each flange is fitted into the two positioning grooves provided in the first arc-shaped projection and the second arc-shaped projection, respectively.

[0017] The head portion provided on the rotary cutting tool assembly is provided with an arrangement groove corresponding to the cutting tool, and a set screw for fixing the cutting tool is provided in the arrangement groove.

[0018] The present invention achieves the following effects by using the above-described technical means. 1. The device of the present invention achieves miniaturization and weight reduction because the cutting feed mechanism provided on its main body is arranged on the outer circumference of the rotary tool assembly and covers the rotary tool assembly, making it easy to grip and operate. Furthermore, the outer shell of the tool feed for the cutting feed function is located on the outermost side, making tool feed control extremely convenient. 2. The protective cover composed of the housing, the two arcuate side wings, the two semi-circular cover bodies, and the knob of the present invention can lower the two arcuate side wings, which is advantageous for the tool changing operation. In other words, by simply loosening the knob, the two arcuate side wings can be rotated and lowered to expose the two side openings, and the tool changing operation can be performed using the two side openings. In addition, a plurality of openings are provided in the two arcuate side wings, which can easily observe the situation where the end face portion of the pipe is processed by the tool, and can prevent chips and shavings from flying and causing injury to people.

Brief Description of the Drawings

[0019] [Figure 1] Stereo external view of the pipe end face flattening device of the present invention. [Figure 2] Overall exploded schematic view of the pipe end face flattening device of the present invention. [Figure 3] Exploded cross-sectional schematic view of the main body and the moving member in the present invention. [Figure 4] Plan view of the pipe end face flattening device of the present invention. [Figure 5] Cross-sectional view a-a of FIG. 4 of the present invention. [Figure 6] Cross-sectional view b-b of FIG. 4 of the present invention. [Figure 7] Schematic view of the usage mode of the pipe end face flattening device of the present invention.

Modes for Carrying Out the Invention

[0020] The present invention relates to a magnetic fixing structure of an end face flattening device, and is mainly used for flattening the end face portion (61) of a pipe (6). As shown in FIGS. 1 and 7, the present invention includes a main body 1, a moving member 2, a rotary tool assembly 3, a protective cover 4, and a grip portion 5. Hereinafter, these components will be described with reference to the drawings.

[0021] As shown in FIGS. 2 to 5, the main body 1 includes a tool feed outer shell 11 and an inner cylinder tube 12. The inner cylinder tube 12 is mounted inside the tool feed outer shell 11. At least one groove 13 is provided around the inner cylinder tube 12, and a spiral groove 14 is provided on the inner wall of the tool feed outer shell 11 corresponding to the groove 13. Two first bearings 15 are provided between the tool feed outer shell 11 and the inner cylinder tube 12. That is, the tool feed outer shell 11 is rotatable with respect to the inner cylinder tube 12.

[0022] As shown in FIGS. 2 to 5, the moving member 2 is provided with at least one protrusion 22 extending laterally from the end of the tube body 21 or connected to the end of the tube body 21. Preferably, two protrusions 22 are screwed to both sides of the end of the tube body 21. The moving member 2 is fitted into the inner cylinder tube 12 with a clearance. Thereby, after the protrusion 22 penetrates at least one groove 13 provided in the inner cylinder tube 12, it is fitted into the spiral groove 14 provided in the tool feed outer shell 11.

[0023] As shown in FIGS. 2 and 5, the rotary tool assembly 3 includes a head portion 31. A hollow rotary shaft 32 extends from the rear end of the head portion 31. The hollow rotary shaft 32 is fitted inside the moving member 2. The head portion 31 protrudes from the moving member 2 and is located inside the inner cylinder tube 12, and a tool 33 is clamped to the head portion 31. In addition, two second bearings 23 are provided between the moving member 2 and the hollow rotary shaft 32 provided on the rotary tool assembly 3. Thereby, the hollow rotary shaft 32 is rotatable with respect to the moving member 2. Further, an arrangement groove 34 is provided in the head portion 31 corresponding to the tool 33, and a set screw 35 for fixing the tool 33 is provided in the arrangement groove 34.

[0024] As shown in Figures 2, 5, and 6, the protective cover 4 is provided at the front end of the inner tube 12 and covers the cutting tool 33. The protective cover 4 is also provided with an insertion hole 432 for receiving the pipe 6 to be processed. The protective cover 4 further comprises a housing 41, two arc-shaped side wings 42, a circular cover body 43, and a knob 44. The housing 41 is provided as a coupling ring portion 410 at the front end of the inner tube 12, with a first arc-shaped projection 411 and a second arc-shaped projection 412 extending in front of the coupling ring portion 410, and the two arc-shaped side wings 42 are pivotally mounted on two pivot portions 413 provided on the first arc-shaped projection 411 and are provided with a plurality of openings 421. The knob 44 is coupled to the second arc-shaped projection 412 and is used to fix the two arc-shaped side wings 42 so as not to rotate. The circular cover body 43 is provided between the first arc-shaped projection 411 and the second arc-shaped projection 412, and the insertion hole 432 is provided on the circular cover body 43.

[0025] In a preferred embodiment, the protective cover 4, as shown in Figures 5 and 6, has at least one positioning column 422 on the inside of each of the two arc-shaped side wings 42, and the second arc-shaped projection 412 has a positioning hole 414 corresponding to each of the at least one positioning column 422. The circular cover body 43 is preferably provided as two semicircular cover bodies 431, one of which is connected to the bottom screw of the knob 44, and each of the two semicircular cover bodies 431 is provided with a flange 433, and each flange 433 is fitted into two positioning grooves 415 provided in the first arc-shaped projection 411 and the second arc-shaped projection 412, respectively.

[0026] As shown in Figures 2 and 5, the grip portion 5 has a motor 51 and a battery module 52 inside. The motor 51 is electrically connected to the battery module 52, and an extension shaft 53 is provided, one end of which is connected to the rotor shaft 54 ​​of the motor 51. The other end of the extension shaft 53 is fitted into the hollow rotating shaft 32 provided in the rotary cutting tool assembly 3. The cross-section of the extension shaft 53 is polygonal, which rotates the hollow rotating shaft 32.

[0027] Therefore, the present invention provides a preferred solution for a pipe end face flattening device, as shown in Figures 5 and 7. The pipe end face flattening device A of the present invention mainly supplies power to the motor 51 by a battery module 52. When an operator starts the motor 51, the rotor shaft 54 ​​provided on the motor 51 rotates, driving the extension shaft 53 to rotate. The rotation of the extension shaft 53 causes the hollow rotating shaft 32 to rotate, and the rotating cutting tool assembly 3 to rotate. The battery module 52 preferably uses a secondary battery, but of course, the battery module 52 may be replaced with a 110V power module.

[0028] When the rotary cutting tool assembly 3 starts rotating, as shown in Figure 7, one end of the pipe 6 is fitted into the insertion hole 432 of the pipe end face flattening device A of the present invention, and the cutting tool 33 located in front of the rotary cutting tool assembly 3 performs flattening on the end face portion 61 of the pipe 6. If it is desired to perform feed processing on the end face portion 61 of the pipe 6, the operator can rotate the cutting tool feed outer shell 11, thereby driving the two protrusions 22 with its helical groove 14 and moving the pipe body 21 of the moving member 2 forward. The moving member 2 displaces the rotating cutting tool assembly 3 forward, allowing the cutting tool 33 to perform flattening on the end face portion 61 of the pipe 6.

[0029] After using the pipe end face flattening device A of the present invention for a certain period of time, the cutting tool 33 will wear down and become dull, requiring replacement with a new cutting tool. At this time, as shown in Figure 6, by loosening the knob 44, each of the positioning columns 422 provided on the two arc-shaped side wings 42 can be detached from each of the positioning holes 414 provided on the second arc-shaped projection 412. This allows the two arc-shaped side wings 42 to rotate and be lowered around their respective pivot parts 413, exposing the two lateral side openings 45. This allows the cutting tool to be replaced using the two side openings 45 without removing the two semicircular cover bodies 431. In addition, the two arc-shaped side wings 42 are provided with multiple openings, which allows for easy observation of the shaping of the end face 61 of the pipe 6 by the cutting tool 33 when performing shaping work on the end face 61 of the pipe 6, and also prevents chips and shavings from flying off and injuring people.

[0030] As stated above, the present invention relates to a pipe end face flattening device, and its structure has never been seen in publications or public use, and therefore meets the requirements for patent application; we earnestly request the prompt granting of patent rights.

[0031] The above describes the technical principles used in specific embodiments of the present invention. Any modifications made based on the concept of the present invention should be included within the scope of the claims of the present invention, as long as their function and operation do not exceed the ideas contained in the present specification and drawings. [Explanation of Symbols]

[0032] A: Pipe end face flattening device (pipe end face finishing device) 1: Main unit 11: Tool feed outer shell 12: Inner tube 13: Groove 14: Spiral groove 15: First bearing 2: Movable member 21: Body 22: Protrusion 23: Second bearing 3: Rotary cutting tool assembly 31: Head section 32: Hollow rotating shaft 33: Cutting tool 34: Placement groove 35: Set screw 4: Protective cover 41: Housing 410: Connecting ring section 411: First arcuate protrusion 412:Second arcuate protrusion 413: Pivot section 414: Positioning hole 415: Positioning groove 42: Arcuate side wing 421: Opening 422: Positioning column 43: Circular cover 431: Semicircular cover 432: Insertion hole 433: Flange 44: Nobu 45: Side opening 5: Grip 51: Motor 52: Battery Module 53: Extension shaft 54: Rotor axis 6: Pipe 61: End face part

Claims

1. It comprises a main body, a movable member, a rotating blade assembly, and a protective cover. The main body comprises a tool feed outer shell and an inner cylindrical tube, the inner cylindrical tube is mounted inside the tool feed outer shell, and at least one groove is provided around the inner cylindrical tube, and a helical groove is provided on the inner wall of the tool feed outer shell. The moving member is provided with at least one projection at its end, and the moving member is mounted inside the inner tube, and the projection passes through the groove provided in the inner tube and then fits into the helical groove provided in the outer shell of the tool feeder, The rotary blade assembly is fitted inside the moving member, A pipe end face flattening device, wherein the protective cover is provided at the front end of the inner cylindrical tube, and the protective cover is provided with an insertion hole.

2. The pipe end face flattening device according to claim 1, wherein the rotary cutting tool assembly comprises a head portion, a hollow rotating shaft extending from the rear end of the head portion, the hollow rotating shaft being fitted inside the movable member, the head portion protruding from the movable member and located inside the inner cylindrical tube, and a cutting tool being clamped in the head portion.

3. The pipe end face flattening device according to claim 2, wherein two first bearings are provided between the tool feed outer shell and the inner cylindrical tube, thereby allowing the tool feed outer shell to rotate relative to the inner cylindrical tube, and two second bearings are provided between the moving member and the hollow rotating shaft provided on the rotating tool assembly, thereby allowing the rotating tool assembly to rotate relative to the moving member.

4. The pipe end face flattening device according to claim 2, further comprising a grip portion, wherein a motor and a battery module are provided within the grip portion, the motor is electrically connected to the battery module, and an extension shaft is further provided, one end of which is connected to the rotor axis of the motor and the other end of which is fitted into the hollow rotating shaft provided in the rotating cutting tool assembly.

5. The pipe end face flattening device according to claim 4, wherein the moving member has two projections provided laterally at the end of the tubular body, so that the two projections pass through two grooves provided in the inner cylindrical tube and then fit into the helical groove provided in the tool feed outer shell, and the cross section of the extension shaft is polygonal.

6. The pipe end face flattening device according to claim 1, wherein the protective cover further comprises a housing, two arc-shaped side wings, a circular cover body, and a knob, the housing being provided as a coupling ring portion with a first arc-shaped projection and a second arc-shaped projection extending in front thereof, the two arc-shaped side wings being pivotally mounted on two pivot portions provided on the first arc-shaped projection, the knob being connected to the second arc-shaped projection and used to fix the two arc-shaped side wings, the circular cover body being provided between the first arc-shaped projection and the second arc-shaped projection, and the insertion hole being provided on the circular cover body.

7. The pipe end face flattening device according to claim 6, wherein the two arc-shaped side wings are provided with a plurality of openings.

8. The pipe end face flattening device according to claim 6 or 7, wherein at least one positioning column is provided on the inside of each of the two arc-shaped side wings, and a positioning hole is provided in the second arc-shaped projection corresponding to each of the at least one positioning column.

9. The pipe end face flattening device according to claim 6, wherein the circular cover body is configured as two semicircular cover bodies, one of the two semicircular cover bodies is connected to the bottom screw of the knob, each of the two semicircular cover bodies is provided with a flange, and each flange is fitted into two positioning grooves provided in the first arc-shaped projection and the second arc-shaped projection, respectively.

10. The pipe end face flattening device according to claim 2, wherein the head portion provided on the rotary cutting tool assembly is provided with an arrangement groove corresponding to the cutting tool, and a set screw for fixing the cutting tool is provided in the arrangement groove.

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