Pipe cutting blade of pipe cutting machine

Abstract

The utility model discloses a pipe cutting blade of a pipe cutting machine, and belongs to the field of pipe cutting machines. The pipe cutting blade of the pipe cutting machine comprises an annular cutting edge, four fourth fixing holes are evenly distributed in the annular cutting edge in a surrounding mode, and a first positioning plate and a second positioning plate are arranged on the two sides of the outer portion of the annular cutting edge respectively. The slitting blade solves the problem that when an annular cutting edge in an existing slitting blade is replaced and fixed, the slitting blade is prone to loosening and shaking after being assembled, and stability is poor in the cutting process. When the annular cutting edge is connected with the second positioning plate and the first positioning plate through bolts at the positions of the fourth fixing holes, the first positioning plate and the second positioning plate are additionally fixed through the position where the third fixing holes are embedded into the movable rail. And bolt fixation is performed through the reserved positions of the second expansion cavity and the first expansion cavity, so that fixation in multiple directions can be provided.

Description

Technical Field

[0001] This utility model relates to the field of pipe cutting machine technology, specifically to a pipe cutting blade for a pipe cutting machine. Background Technology

[0002] The pipe cutting blade of a pipe cutting machine is a tool component specially designed for cutting pipes of metal, plastic and other materials. It is usually made of high-strength and high-hardness materials such as steel, titanium, and diamond. It has a sharp cutting edge and can effectively transmit cutting force. The blade has various shapes, including ring and serrated, to adapt to different pipe materials and cutting needs. By applying cutting force, the blade can gradually cut along the surface of the pipe.

[0003] Chinese patent CN211250177U discloses a blade for cutting LED light strips, including a mounting plate. The mounting plate includes a first mounting plate and a second mounting plate. The mounting plate is composed of a shaft positioning plate and a blade positioning plate. The inner diameter of the blade positioning plate is larger than the inner diameter of the shaft positioning plate. The shaft positioning plate and the blade positioning plate are an integral structure, consisting of a mounting plate and a blade. The two are fixed together by bolts. When the blade edge becomes dull or damaged, the blade can be removed and replaced with a new one. The mounting plate can be reused, saving resources, reducing costs, and making it highly practical.

[0004] When the annular blade inside the aforementioned patented slitting blade is replaced and fixed, the shaft positioning plates on both sides of the annular blade for fixing are only connected to the annular blade, and there is no direct connection between the two shaft positioning plates. This results in poor overall integrity of the entire slitting blade, which is prone to loosening and shaking after the slitting blade is assembled, leading to poor stability during the cutting process. Utility Model Content

[0005] The purpose of this utility model is to provide a pipe cutting blade for a pipe cutting machine. When the annular blade is connected to the second positioning plate and the first positioning plate by bolts at the fourth fixing hole, the first positioning plate and the second positioning plate are further fixed by the embedded movable rail position of the third fixing hole. Furthermore, the bolts are fixed through the reserved second expansion cavity and the first expansion cavity, which can provide fixation in multiple directions, improve the tightness of the connection between the annular blade and the first positioning plate and the second positioning plate, and solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pipe cutting blade for a pipe cutting machine, comprising an annular blade with four fourth fixing holes evenly distributed around it. A second positioning plate and a first positioning plate are respectively provided on both sides of the outer surface of the annular blade. Four sliding blocks, welded and fixed by connecting blocks, are evenly distributed around the side of the first positioning plate facing the second positioning plate. A movable rail is provided on the second positioning plate facing the sliding blocks. Four first fixing holes are evenly distributed around the interior of the second and first positioning plates. A second enlarged cavity is provided outside two of the first fixing holes in the second positioning plate, and a first enlarged cavity is provided outside two of the first fixing holes in the first positioning plate. A third fixing hole is embedded into the movable rail position as the first and second positioning plates approach each other, providing additional connection. Pre-installed bolts can be inserted from the second and first enlarged cavities, allowing the annular blade to be independently connected to the second and first positioning plates respectively.

[0007] Preferably, a second fixing hole is provided between two adjacent first fixing holes inside the second positioning plate, and a third fixing hole overlapping the center of the second fixing hole is provided in the recess of the sliding block, connecting block and the first positioning plate. A fixing rod is provided inside the third fixing hole and the second fixing hole, which is threaded to the third fixing hole. After the third fixing hole moves and rotates along the limiting plate, the sliding movable rail is fixed by rotating the fixing rod in the third fixing hole, thereby fixing the connection between the second positioning plate and the first positioning plate.

[0008] Preferably, after the sliding block, connecting block and first positioning plate are rotated, the center of the second fixing hole overlaps with the center of the third fixing hole, and the center of the fourth fixing hole overlaps with the center of the first fixing hole. The overlap of the center of the second fixing hole and the center of the third fixing hole facilitates the passage of the fixing rod.

[0009] Preferably, the bolt with the first enlarged cavity and the second enlarged cavity is threaded through the first fixed hole. After the bolt passes through the enlarged position of the first enlarged cavity and the second enlarged cavity respectively, the protruding ring structure at the end of the bolt will directly contact and fit the ring blade. Combined with the threaded engagement of the bolt and the first fixed hole, the ring blade can be independently connected to the second positioning plate and the first positioning plate on both sides respectively.

[0010] Preferably, the second enlarged cavity and the first enlarged cavity do not overlap in center, and the four bolts are respectively inserted from the positions of the second enlarged cavity and the first enlarged cavity where the centers do not overlap, which can provide a stable connection position between the bolts and the first positioning plate and the second positioning plate.

[0011] Preferably, the upper and lower ends of the inner wall of the movable rail are provided with limiting plates, and the limiting plates extend from one side of the movable rail to the middle position of the movable rail. The area between the limiting plates and the other side of the movable rail is sufficient for the sliding block and the connecting block to be completely inserted. The spacing between the two limiting plates is adapted to the connecting block. The protrusion of the limiting plates can prevent the sliding block from protruding.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] When replacing and fixing the annular blade between the first and second positioning plates, this invention firstly moves the sliding block towards the second positioning plate via a connecting block, eventually embedding it into the movable rail position. As the first positioning plate rotates, the center of the third fixing hole overlaps with the center of the second fixing hole. After overlap, a fixing rod can pass through to fix the first and second positioning plates. Secondly, two of the four first fixing holes surrounding the second positioning plate have second enlarged cavities on their outer surfaces. Simultaneously, two of the four first fixing holes surrounding the first positioning plate have first enlarged cavities on their outer surfaces. Finally, the fixing... The bolts need to pass through the first and second positioning plates and be embedded inside the fourth fixing hole. The enlarged first and second enlarged cavities allow the bolts to directly contact both sides of the annular blade through the positions of the first and second enlarged cavities. This allows the annular blade and the first positioning plate to be connected through the bolts at the positions of the second enlarged cavities, the second positioning plate and the annular blade to be connected through the bolts at the positions of the first enlarged cavities, and the first and second positioning plates to be connected through the bolts at the positions of the second fixing holes. The annular blade, the first positioning plate, and the second positioning plate are interconnected, improving the tightness of the connection. This increased tightness improves the stability of the annular blade during subsequent rotary cutting. Attached Figure Description

[0014] Figure 1 This is a schematic diagram showing the positional relationship of the first positioning plate of this utility model;

[0015] Figure 2 This is a schematic diagram of the external structure of the second positioning plate of this utility model;

[0016] Figure 3 This is an exploded view of the overall structure of this utility model;

[0017] Figure 4 This is a cross-sectional view of the fixing rod connection structure of this utility model;

[0018] Figure 5 For the present utility model Figure 4 Enlarged view of a portion of region A in the middle;

[0019] Figure 6This is a schematic diagram of the overall external structure of this utility model;

[0020] Figure 7 This is a schematic diagram of the bolt installation into the internal structure of the second enlarged cavity of this utility model.

[0021] In the diagram: 1. Circular blade; 2. First positioning plate; 3. Second positioning plate; 4. First fixing hole; 5. First enlarged cavity; 6. Second enlarged cavity; 7. Second fixing hole; 8. Fixing rod; 9. Sliding block; 10. Third fixing hole; 11. Connecting block; 12. Movable rail; 13. Limiting plate; 14. Fourth fixing hole; 15. Bolt. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments.

[0023] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the pipe cutting blade of a pipe cutting machine in this embodiment includes an annular blade 1. A second positioning plate 3 is provided on one side of the annular blade 1, and a first positioning plate 2 is provided on the other side of the annular blade 1. The annular blade 1 can be easily driven and rotated by the pipe cutting machine by the first positioning plate 2 and the second positioning plate 3. When the first positioning plate 2 and the second positioning plate 3 are separated, the annular blade 1 can be easily replaced.

[0024] Among them, four fourth fixing holes 14 are evenly distributed around the center of the annular blade 1, and the fourth fixing holes 14 penetrate and extend to both sides of the annular blade 1. The four fourth fixing holes 14 reserved in the annular blade 1 facilitate the passage of the bolt 15 and the fixing of the bolt 15 to the annular blade 1.

[0025] Furthermore, four sliding blocks 9 are evenly distributed around the side of the first positioning plate 2 facing the second positioning plate 3, and the sliding blocks 9 are welded and fixed to the first positioning plate 2 by connecting blocks 11. The second positioning plate 3 is recessed with a movable rail 12 facing the sliding blocks 9. When the first positioning plate 2 and the second positioning plate 3 clamp and fix the annular blade 1, the sliding blocks 9 connected by the connecting blocks 11 are embedded in the movable rail 12 to complete the assembly of the first positioning plate 2 and the second positioning plate 3.

[0026] It is worth mentioning that, such as Figure 4 and Figure 5As shown, the upper and lower ends of the inner wall of the movable rail 12 are provided with limiting pieces 13, and the limiting pieces 13 extend from one side of the movable rail 12 to the middle position of the movable rail 12. The area between the limiting pieces 13 and the other side of the movable rail 12 is used to completely insert the sliding block 9 and the connecting block 11. The spacing between the two limiting pieces 13 is adapted to the connecting block 11. The limiting pieces 13 restrict the sliding block 9 to prevent the sliding block 9 from falling off. The limiting pieces 13 and the second positioning plate 3 are an integral structure.

[0027] Furthermore, the second positioning plate 3 and the first positioning plate 2 have four first fixing holes 4 evenly distributed around the annular blade 1, and the fourth fixing hole 14 overlaps with the center of the first fixing hole 4.

[0028] In addition, such as Figure 3 As shown, a second fixing hole 7 is provided between each of the two adjacent first fixing holes 4 inside the second positioning plate 3. A third fixing hole 10 is recessed inside the sliding block 9, the connecting block 11, and the first positioning plate 2. After the sliding block 9, the connecting block 11, and the first positioning plate 2 are rotated, the centers of the second fixing hole 7 and the third fixing hole 10 overlap. A fixing rod 8 is provided through the third fixing hole 10 and the second fixing hole 7, and the fixing rod 8 is threaded into the third fixing hole 10. After the sliding block 9, the connecting block 11, and the first positioning plate 2 are rotated and embedded, the connection between the first positioning plate 2 and the second positioning plate 3 is achieved through the penetration of the fixing rod 8.

[0029] To allow the second positioning plate 3 and the annular blade 1 to be connected independently, and similarly, to allow the first positioning plate 2 and the annular blade 1 to be connected independently, and to allow for independent fixing on both sides of the annular blade 1 and improve the stability of the annular blade 1 after connection, two of the first fixing holes 4 in the second positioning plate 3 are provided with second enlarged cavities 6, and two of the first fixing holes 4 in the first positioning plate 2 are provided with first enlarged cavities 5. Bolts 15 pass through the positions of the first enlarged cavities 5 and the second enlarged cavities 6, and four bolts 15 are inserted from the positions of the two first enlarged cavities 5 and the two second enlarged cavities 6, respectively. Through the two first enlarged cavities 5 and the two second enlarged cavities 6, the enlarged ends of the bolts 15 can directly contact the annular blade 1. The bolts 15 are threadedly engaged with the first fixing holes 4. Through the contact between the bolts 15 and the annular blade 1 and the threaded engagement between the bolts 15 and the first fixing holes 4, the annular blade 1 can be fixed on both sides, so that the annular blade 1 is tightly connected to the second positioning plate 3 and the first positioning plate 2 respectively.

[0030] It is worth mentioning that the centers of the second enlarged cavity 6 and the first enlarged cavity 5 do not overlap, thus avoiding collisions caused by the overlapping of the centers of the second enlarged cavity 6 and the first enlarged cavity 5 when the bolt 15 is inserted and fixed.

[0031] Working principle: When using a pipe cutting machine and having the pipe cutting blade driven by the machine to cut, when periodically replacing the annular blade 1, the annular blade 1 is placed between the first positioning plate 2 and the second positioning plate 3. The first positioning plate 2, through the connecting block 11, drives the sliding block 9 to embed into the movable rail 12. The sliding block 9 rotates within the movable rail 12, causing it to move along the movable rail 12. When moving along the movable rail 12, the protruding sliding block 9 is restrained by the limiting piece 13 to prevent it from falling off the movable rail 12. The rotating fixing rod 8 enters the second fixing hole 7, and the fixing rod 8 inside the second fixing hole 7 embeds into the third fixing hole 10 inside the sliding block 9, fixing the first positioning plate 3. Plate 2 and the second positioning plate 3 use a total of four bolts 15. Two bolts 15 pass through the second expansion cavity 6 and are then inserted into the fourth fixing hole 14 and the first fixing hole 4 inside the first positioning plate 2. The other two bolts 15 pass through the first expansion cavity 5 and are then inserted into the fourth fixing hole 14 and the first fixing hole 4 inside the second positioning plate 3. This completes the replacement of the annular blade 1 and fixes the annular blade 1 between the second positioning plate 3 and the first positioning plate 2. The bolts 15 exposed from the first fixing hole 4 are connected to the output position of the pipe cutter, which can start the pipe cutter and drive the annular blade 1 to rotate to complete the cutting.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A pipe cutting blade for a pipe cutting machine comprising an annular cutting edge (1) having four fourth fixing holes (14) distributed uniformly around the annular cutting edge (1), characterized in that, The outer sides of the annular blade (1) are respectively provided with a first positioning plate (2) and a second positioning plate (3). The side of the first positioning plate (2) facing the second positioning plate (3) is evenly distributed with four sliding blocks (9) welded and fixed by connecting blocks (11). The second positioning plate (3) is provided with a movable rail (12) facing the sliding block (9). The second positioning plate (3) and the first positioning plate (2) are evenly distributed with four first fixing holes (4) inside. Two of the first fixing holes (4) in the second positioning plate (3) are provided with a second enlarged cavity (6) outside. Two of the first fixing holes (4) in the first positioning plate (2) are provided with a first enlarged cavity (5) outside.

2. A pipe cutting blade for a pipe cutting machine according to claim 1, wherein, The second positioning plate (3) has a second fixing hole (7) between two adjacent first fixing holes (4). The sliding block (9), the connecting block (11) and the first positioning plate (2) have a third fixing hole (10) that overlaps with the center of the second fixing hole (7). The third fixing hole (10) and the second fixing hole (7) have a fixing rod (8) that is threaded into the third fixing hole (10).

3. A pipe cutting blade for a pipe cutting machine according to claim 2, wherein, After the sliding block (9), connecting block (11) and first positioning plate (2) rotate, the center of the second fixing hole (7) overlaps with the center of the third fixing hole (10), and the center of the fourth fixing hole (14) overlaps with the center of the first fixing hole (4).

4. A pipe cutting blade for a pipe cutting machine according to claim 1, wherein, The first enlarged cavity (5) and the second enlarged cavity (6) are located through the bolt (15) threaded into the first fixed hole (4).

5. A pipe cutting blade for a pipe cutting machine according to claim 4, wherein, The centers of the second enlarged cavity (6) and the first enlarged cavity (5) do not overlap.

6. The pipe cutting blade of a pipe cutting machine according to claim 1, characterized in that, The upper and lower ends of the inner wall of the movable rail (12) are provided with limiting plates (13), and the limiting plates (13) extend from one side of the movable rail (12) to the middle position of the movable rail (12). The area between the limiting plates (13) and the other side of the movable rail (12) is used for the sliding block (9) and the connecting block (11) to be completely inserted. The spacing between the two limiting plates (13) is adapted to the connecting block (11).

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