Cutter

Abstract

The utility model discloses a cutter, which belongs to the technical field of cutting tools, is used for cutting a corrugated pipe and comprises a cutter rest which is of an arc-shaped structure matched with the corrugated pipe. Holding parts are arranged at the two ends of the knife rest; the tool rest is provided with a positioning side, and the positioning side is used for being attached to the wave crest of the corrugated pipe to position the tool rest. The tool rest is provided with a hollow part, the hollow part penetrates through the positioning side of the tool rest, and the wave crest of the corrugated pipe can be observed through the hollow part. The positioning condition of the wave crest of the corrugated pipe and the tool rest can be observed in time through the hollow part, the tool rest can be conveniently and accurately positioned to the position of the wave crest, the tool setting frequency of the tool rest and the wave crest is reduced, the positioning efficiency is improved, and then the cutting efficiency of the corrugated pipe is improved.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool technology, and more specifically, to a cutting knife. Background Technology

[0002] HDPE double-wall corrugated pipes for drainage are a new type of pipe made primarily of polyethylene resin with the addition of appropriate additives, produced through extrusion molding. They are suitable for outdoor drainage in buildings and municipal sewage systems. The corrugated pipes are continuously extruded and need to be cut to the required specifications.

[0003] To improve cutting efficiency, some companies currently use automatic cutting machines to cut corrugated pipes. However, the high cutting speed of automatic cutting machines can easily cause the corrugated pipes to crack, and this cracking is difficult to detect. Therefore, some companies use manual cutting tools to cut corrugated pipes. For example, Chinese patent document CN205766418U discloses a corrugated pipe cutting tool, which includes a positioning frame and handles fixedly connected to both ends of the positioning frame. The positioning frame has an arc-shaped top plate that matches the corrugated pipe and two parallel side plates that are respectively connected to both sides of the arc-shaped top plate. The side of the side plate away from the top plate is arc-shaped to match the corrugated pipe, and the distance between the two side plates matches the width of the corrugated pipe's convex ring. A cutter is provided on one of the side plates. However, when using the corrugated ring, i.e., the crest, for positioning, the positioning frame of this corrugated pipe cutting tool makes it difficult to observe the crest position and accurately align the corrugated pipe, thus reducing positioning efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a cutter that solves the problem that in the prior art, when the positioning frame of the corrugated pipe cutting tool uses the convex ring, i.e. the crest, of the corrugated pipe for positioning, it is not easy to observe the position of the crest and it is difficult to accurately align the position of the crest of the corrugated pipe.

[0005] To achieve the above objectives, this utility model provides a cutter for cutting corrugated pipes, including a cutter holder, which is an arc-shaped structure that fits the corrugated pipe; both ends of the cutter holder are provided with gripping parts; the cutter holder is provided with a positioning side, which is used to fit the crest of the corrugated pipe to position the cutter holder; the cutter holder is provided with a hollow part, which passes through the positioning side of the cutter holder, and the crest of the corrugated pipe can be observed through the hollow part.

[0006] Furthermore, the tool holder includes two sets of parallel arc-shaped arms, the two sets of arc-shaped arms are spaced apart and both ends of the two sets of arc-shaped arms are connected by end plates, the end plates and the spaced-apart portion form the hollow portion; the grip portion is connected to the end plates.

[0007] Furthermore, a reinforcing block is connected between the two sets of arc-shaped arms, and the side of the reinforcing block facing the bellows is an arc-shaped surface that fits the crest of the bellows.

[0008] Furthermore, the reinforcing block is positioned to avoid the corrugated pipe on its side, thus creating a clearance space between the reinforcing block and the arc-shaped arm.

[0009] Furthermore, the contact surface between the arc-shaped arm and the crest of the bellows is an inclined surface that fits the two sides of the crest apex.

[0010] Furthermore, the arc-shaped arm, end plate, and reinforcing block are an integral structure.

[0011] Furthermore, a blade head is mounted on one end of the blade holder near its grip, with the blade edge facing the direction of the bellows.

[0012] Furthermore, the distance between the side of the cutter head and the side of the cutter holder is 0-10cm.

[0013] Furthermore, the cutter head is provided with a mounting part, the cutter holder is provided with a mounting position, and the mounting part is slidably connected to the mounting position; the cutter holder is equipped with fasteners, and the fasteners fix the mounting part and the mounting position.

[0014] Furthermore, the mounting position is a convex groove formed on the end plate; the mounting part is a convex block that is locked in the convex groove; the fastener is a fastening bolt, which is threadedly connected to the end plate and the end of the fastening bolt passes through the end plate and abuts against the convex block.

[0015] Compared with existing known technologies, the technical solution provided by this utility model has the following beneficial effects:

[0016] This utility model discloses a cutter with a cutter holder that conforms to the curved structure of a corrugated pipe. This allows for a good fit against the outer surface of the pipe, increasing contact between the cutter holder and the pipe surface and improving positioning stability. Both ends of the cutter holder are equipped with grips, allowing the operator to hold them with both hands for easier force application during pipe cutting, conforming to ergonomic design. The positioning side of the cutter holder facilitates positioning of the cutter holder against the corrugated pipe crests. A perforated section extends through the positioning side, allowing the operator to easily observe the positioning of the corrugated pipe crests and the cutter holder, enabling precise positioning of the cutter holder to the crests, reducing the frequency of blade alignment, improving positioning efficiency, and ultimately enhancing the cutting efficiency of the corrugated pipe.

[0017] It is obvious that the elements or features described in the above individual embodiments can be used alone or in combination in other embodiments. Attached Figure Description

[0018] The dimensions and scales in the accompanying drawings do not represent the actual dimensions and scales of the product. The drawings are for illustrative purposes only, and some non-essential elements or features have been omitted for clarity.

[0019] Figure 1 This is a schematic diagram of the cutter structure in an embodiment of this utility model;

[0020] Figure 2 This is a schematic diagram of the blade head position in an embodiment of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the cutter including the handle in an embodiment of this utility model;

[0022] Figure 4 This is a schematic diagram showing the state of the cutter positioned on the outside of the corrugated pipe in an embodiment of this utility model;

[0023] Figure 5 This is a schematic diagram showing the positioning state of the cutter and the bellows in an embodiment of this utility model.

[0024] Explanation of reference numerals in the attached figures

[0025] 100. Tool holder; 110. Hollowed-out section; 120. Arc arm; 121. Contact surface; 122. End plate; 130. Reinforcing block; 140. Clearance space; 150. Mounting position; 200. Grip part; 210. Handle; 300. Tool head; 310. Mounting part; 400. Fastener. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings. The embodiments described herein are merely preferred embodiments of the present invention. Those skilled in the art can conceive of other ways to implement the present invention based on the preferred embodiments, and such other ways also fall within the scope of the present invention.

[0027] Reference Figures 1-5This embodiment provides a cutter for cutting corrugated pipes, including a cutter holder 100, which is an arc-shaped structure that fits the corrugated pipe. The cutter holder 100 can fit well against the outer surface of the corrugated pipe, increasing the contact between the cutter holder 100 and the surface of the corrugated pipe and improving the positioning stability of the cutter holder 100 and the corrugated pipe. Both ends of the cutter holder 100 are provided with grips 200, which can be held by the operator with both hands, making it easier for the operator to apply force when cutting the pipe, which conforms to ergonomic design. The cutter holder 100 is provided with a positioning side, which is set to fit the crest of the corrugated pipe when cutting the pipe, so that the cutter holder 100 is positioned. The cutter holder 100 is provided with a hollow part 110, which passes through the positioning side of the cutter holder 100, and the crest of the corrugated pipe can be observed through the hollow part 110. The cutout 110 allows for timely observation of the positioning of the corrugated tube between the tool holder 100 and the corrugated tube, facilitating precise positioning of the tool holder 100 to the position of the corrugated tube, reducing the frequency of tool alignment between the corrugated tube and the tool holder 100, improving positioning efficiency, and thus enhancing the cutting efficiency of the corrugated tube.

[0028] In some embodiments, such as Figure 1 As shown, the tool holder 100 includes two sets of parallel arc-shaped arms 120. The two sets of arc-shaped arms 120 are spaced apart, and both ends of the two sets of arc-shaped arms 120 are connected by end plates 122. The end plates 122 and the spacers form a hollow portion 110. The shape of the arc-shaped arms 120 conforms to the curvature of the outer surface of the corrugated pipe, increasing the fit between the tool holder 100 and the corrugated pipe, preventing the tool holder 100 from lifting up at the grip portion 200 when cutting the corrugated pipe, and improving the accuracy of cutting the corrugated pipe by rotating the tool holder 100 around the axis of the corrugated pipe with both hands. The end plates 122 connect the two sets of arc-shaped arms 120, improving the overall strength of the tool holder 100. Moreover, the grip portion 200 is connected to the end plates 122 and is located on the outermost side of the arc length direction of the tool holder 100, making it convenient for the operator to perform cutting actions. It can be understood that the grip portion 200 has a cylindrical structure for easy gripping. Furthermore, the grip 200 and end plate 122 can be detachably connected, such as by threaded connection or snap-fit ​​connection, to facilitate disassembly of the grip 200 and reduce space occupation when the cutter is not in use. Of course, the grip 200 and end plate 122 can also be fixedly connected, such as by welding. To further improve the comfort of holding the cutter holder 100, such as... Figure 3 As shown, a handle 210 is attached to the grip portion 200, and the length direction of the handle 210 is perpendicular to the length direction of the grip portion 200. The two handles 210 extend in opposite directions, i.e., in a relatively far direction, to further improve grip comfort. The handles 210 can be connected to the grip portion 200 by welding, or by integral molding technology, or by threaded connection.

[0029] Furthermore, a reinforcing block 130 connects the two sets of arc-shaped arms 120. The reinforcing block 130 increases the structural strength of the tool holder 100, enabling it to withstand the force applied by the operator. The side of the reinforcing block 130 facing the bellows has an arc-shaped surface that fits the crest of the bellows, improving the contact stability between the reinforcing block 130 and the bellows crest. It should be noted that the tool holder 100 is mainly positioned by the contact between the arc-shaped arms 120 and the bellows crest, therefore the position of the reinforcing block 130 should avoid interfering with the positioning work of the arc-shaped arms 120 as much as possible. The side of the reinforcing block 130 facing the bellows is positioned away from the bellows, forming a clearance space 140 between the reinforcing block 130 and the arc-shaped arms 120. The clearance space 140 allows the position of the crest apex to extend towards the reinforcing block 130. In the most extreme case, the crest apex of the bellows contacts the arc-shaped surface of the reinforcing block 130. To further improve the positioning stability of the tool holder 100 and the bellows, the contact surface 121 between the arc arm 120 and the bellows crest is a sloped surface that fits the outer side of the crest, i.e., the sloped surfaces on both sides of the crest's apex. It can be understood that the sides of the crest's apex are sloping surfaces, and the arc arm 120's contact surface 121 being a sloped surface allows for better fit to the crest.

[0030] To further improve the structural strength of the tool holder 100, in some embodiments, the arc-shaped arm 120, end plate 122, and reinforcing block 130 are integrally formed. When the tool holder 100 is made of hard plastic, the arc-shaped arm 120, end plate 122, and reinforcing block 130 are integrally formed by injection molding. When the tool holder 100 is made of metal, such as steel, the arc-shaped arm 120, end plate 122, and reinforcing block 130 are manufactured by casting, and the surface of the tool holder 100 after casting is polished smooth.

[0031] Understandably, cutting pipes requires cutting components, such as... Figure 1 and Figure 4 As shown, a cutter head 300 is mounted on one end of the cutter holder 100 near its grip 200, with the cutting edge of the cutter head 300 facing the direction of the corrugated pipe. When the operator holds the grip 200 and rotates the entire cutter holder 100, the cutter head 300 can embed into the pipe and perform a circumferential cut. Corrugated pipes come in various specifications depending on actual needs, and the spacing between the corrugations varies. To accurately cut between the corrugations, the position of the cutter head 300 is not unique. Specifically, the distance between the side of the cutter head 300 and the side of the cutter holder 100 is 0–10 cm, including two endpoints. When the distance between the side of the cutter head 300 and the side of the cutter holder 100 is 0 cm, the cutter head 300 is in contact with the side of the cutter holder 100. The distance between the side of the cutter head 300 and the side of the cutter holder 100 can be 0 cm, 1 cm, 2 cm, 3 cm…10 cm.

[0032] Of course, besides setting different distances between the cutter head 300 and the tool holder 100, a cutter head 300 structure with adjustable position can also be provided. In some embodiments, such as Figure 2 and Figure 5 As shown, the cutter head 300 is provided with a mounting part 310, and the cutter holder 100 is provided with a mounting position 150. The mounting part 310 and the mounting position 150 are slidably connected. The cutter holder 100 is equipped with a fastener 400, which fixes the mounting part 310 and the mounting position 150. By adjusting the fastener 400, the mounting part 310 and the mounting position 150 can slide, thereby adjusting the distance between the cutter head 300 and the cutter holder 100 to adapt to bellows structures with different crest spacings. Specifically, the mounting position 150 is a convex groove formed on the end plate 122; the mounting part 310 is a convex block that is engaged in the convex groove; the fastener 400 is a fastening bolt, which is threadedly connected to the end plate 122, and the end of the fastening bolt passes through the end plate 122 and abuts against the convex block. It should be noted that the mounting part 310 of the cutter head 300, the mounting position 150 of the tool holder 100 and the fastener 400 can also adopt other structures, and those skilled in the art can choose according to the actual working environment.

[0033] In the description of this utility model, it should be noted that the terms "front," "rear," "left," "right," "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] The scope of protection of this utility model is defined only by the claims. Thanks to the teachings of this utility model, those skilled in the art will readily recognize that alternative structures to the disclosed structure can be used as feasible alternative implementations, and that the disclosed implementations can be combined to produce new implementations, which also fall within the scope of the appended claims.

Claims

1. A cutter for cutting corrugated pipes, comprising a cutter holder (100), the cutter holder (100) being an arc-shaped structure conforming to the corrugated pipe; both ends of the cutter holder (100) are provided with gripping portions (200); characterized in that, The tool holder (100) is provided with a positioning side, which is used to fit the crest of the corrugated pipe to position the tool holder (100); the tool holder (100) is provided with a hollow part (110), which penetrates the positioning side of the tool holder (100), and the crest of the corrugated pipe can be observed through the hollow part (110).

2. The cutter according to claim 1, characterized in that, The tool holder (100) includes two sets of parallel arc-shaped arms (120), the two sets of arc-shaped arms (120) are spaced apart and both ends of the two sets of arc-shaped arms (120) are connected by end plates (122), the end plates (122) and the spaced-apart form the hollow portion (110); the grip portion (200) is connected to the end plates (122).

3. A cutter according to claim 2, wherein A reinforcing block (130) is connected between the two sets of arc-shaped arms (120), and the side of the reinforcing block (130) facing the bellows is an arc-shaped surface that fits the crest of the bellows.

4. A cutter according to claim 3, wherein The reinforcing block (130) is positioned to avoid the corrugated pipe on the side facing away from it, and a clearance space (140) is formed between the reinforcing block (130) and the arc-shaped arm (120).

5. The cutter of claim 2 wherein, The contact surface (121) between the arc-shaped arm (120) and the corrugated pipe crest is an inclined surface that fits the outer side of the crest.

6. A cutter according to claim 1, characterized in that, The grips (200) at both ends are connected to handles (210), and the two handles (210) extend in opposite directions.

7. A cutter according to claim 2, characterized in that, The blade holder (100) is equipped with a blade head (300) at one end near its grip (200), and the blade of the blade head (300) is oriented toward the bellows.

8. A cutter according to claim 7, characterized in that, The distance between the side of the cutter head (300) and the side of the cutter holder (100) is 0-10cm.

9. A cutter according to claim 7, characterized in that, The cutting head (300) is provided with a mounting part (310), and the cutting tool holder (100) is provided with a mounting position (150). The mounting part (310) and the mounting position (150) are slidably connected. The cutting tool holder (100) is equipped with a fastener (400), and the fastener (400) fixes the mounting part (310) and the mounting position (150).

10. A cutter according to claim 9, characterized in that, The mounting position (150) is a convex groove, which is opened on the end plate (122); the mounting part (310) is a convex block, which is stuck in the convex groove; the fastener (400) is a fastening bolt, which is threadedly connected to the end plate (122) and the end of the fastening bolt passes through the end plate (122) and abuts against the convex block.

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