PVC pipe cutting knife

Abstract

The utility model relates to a PVC pipe cutting knife, and belongs to the technical field of pipeline cutting knives, the PVC pipe cutting knife comprises a fixed handle, a movable handle and a blade assembly, the blade assembly comprises a blade, a knife holder and limiting plates, a movable wrench is hinged to the fixed handle, the blade and the knife holder are located between the limiting plates on the two sides, the limiting plates are rotationally arranged on the movable handle, the blade is clamped on the knife holder, and the movable handle is hinged to the movable handle. A mounting shaft penetrates through the limiting plate in a sliding manner, the mounting shaft penetrates through the blade, a limiting ball is arranged on the mounting shaft in a sliding manner, a limiting groove for clamping the limiting ball is formed in the limiting plate deviating from the end cover, and the blade is located between the limiting ball and the limiting plate close to the end cover; under the action of the limiting plates on the two sides, the front-back positions of the blade and the tool apron are limited, the limiting plates are rotationally arranged on the movable handle and matched with the blade and the tool apron in an inserted mode, the left-right positions of the blade and the tool apron are limited, and under the action of the mounting shaft, the up-down positions of the blade and the tool apron are limited. And therefore, the cutting knife can conveniently carry out cutting operation and the blade can be conveniently replaced.

Description

Technical Field

[0001] The present application relates to the technical field of pipe cutting knives, and in particular to a PVC pipe cutting knife. Background Art

[0002] When pipes are produced, they have fixed length specifications according to transportation requirements and national regulations. However, when pipes are installed and used, due to the complexity and diversity of the use occasions, the length requirements of the pipes are different, so the pipes need to be cut when they are used. The original pipe cutting did not have a special cutting tool, and most of them directly used knives, but cutting directly with knives is time-consuming and laborious. Therefore, after research, a pipe cutting knife was developed.

[0003] At present, a patent application document with authorization announcement number CN211915666U discloses a pipe cutter with a quickly replaceable blade, comprising a fixed handle and a blade assembly hinged on the fixed handle, the blade assembly comprising a blade and a knife seat, one end of the blade is provided with a plug-in portion, the plug-in portion is plugged into the knife seat; a first card slot is provided on the plug-in portion, a second card slot corresponding to the first card slot is provided on the knife seat, the first card slot and the second card slot form a limiting slot, a limiting rod matching the limiting slot is slidably installed on the knife seat; when replacing the blade, the limiting rod is slid to disengage the limiting rod from the limiting slot, and then the blade is pulled out; the utility model provides a pipe cutter with a quickly replaceable blade, which overcomes the defects of the existing pipe cutter blades that are inconvenient to replace, troublesome to disassemble and assemble, and time-consuming and labor-intensive to disassemble and assemble.

[0004] However, after the blade is removed from the blade seat, the limit rod returns to the limit groove under the action of the spring. At this time, the blade cannot be moved into the blade seat, and the limit screw needs to be pressed again so that the connecting part is placed in the limit groove before the blade can be installed on the blade seat, which makes the installation of the blade more cumbersome. Utility Model Content

[0005] In order to facilitate the disassembly and assembly of the blade, the present application provides a PVC pipe cutting knife.

[0006] The present application provides a PVC pipe cutting knife adopts the following technical solution:

[0007] A PVC pipe cutting knife comprises a fixed handle, a movable handle and a blade assembly, the blade assembly comprises a blade, a blade holder and a limit plate, the movable handle is hinged on the fixed handle, the blade and the blade holder are located between the limit plates on both sides, the limit plate is rotatably set on the movable handle, the blade is clamped on the blade holder, a mounting shaft is slidably penetrated on the limit plate, the mounting shaft passes through the blade, an end cover is provided at one end of the mounting shaft, the end cover abuts the limit plate, a limit ball is slidably provided on the mounting shaft, the sliding direction of the limit ball is perpendicular to the axial direction of the mounting shaft, a limit groove for the limit ball to be clamped is provided on the limit plate away from the end cover, and the blade is located between the limit ball and the limit plate close to the end cover.

[0008] Optionally, the blade seat is provided with an inserting portion, and the blade is provided with an inserting groove for the inserting portion to be inserted into.

[0009] Optionally, a sliding groove is provided on the side wall of the installation shaft, the limiting ball is slidably arranged in the sliding groove, a spring is arranged on the installation shaft through the sliding groove, one end of the spring is fixedly arranged at the bottom of the sliding groove, and the other end is fixedly arranged on the limiting ball.

[0010] Optionally, a connecting bolt is provided on the movable handle, and the connecting bolt passes through a limiting plate and a knife holder, and the limiting plate away from the connecting bolt is threadedly connected to the connecting bolt, and the knife holder is rotatably connected to the connecting bolt.

[0011] In summary, the present application includes at least one of the following beneficial technical effects:

[0012] 1. When replacing the blade, pull the end cover or press the installation shaft, and the installation shaft moves toward the direction of the end cover. During the movement of the installation shaft, the limit ball abuts against the installation hole on the blade, and the limit ball has a movement tendency toward the inside of the installation shaft. After the limit ball enters the installation shaft, the limit ball passes through the installation hole and separates from the limit plate. Then the blade is removed, and the replaced blade is installed between the limit plates. Then the installation shaft is plugged into the limit plate. After the limit ball passes through the installation hole, the limit ball slides out of the installation shaft, and the blade is clamped between the limit ball and the limit plate. The blade replacement is completed. The operation is simple and convenient.

[0013] 2. Under the action of the limit plates on both sides, the front and rear positions of the blade and the knife holder are limited. The limit plates are rotatably set on the movable handle and the blade and the knife holder are plugged together to limit the left and right positions of the blade and the knife holder. Under the action of the mounting shaft, the upper and lower positions of the blade and the knife holder are limited, thereby facilitating the cutting operation of the cutting knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a PVC pipe cutting knife according to an embodiment of the present application;

[0015] Figure 2 It is a side view of a PVC pipe cutting knife according to an embodiment of the present application;

[0016] Figure 3 yes Figure 2 A magnified schematic diagram of part A;

[0017] Figure 4 An exploded schematic diagram of a PVC pipe cutting knife according to an embodiment of the present application;

[0018] Figure 5 It is a structural schematic diagram of a limit plate and a blade assembly in a PVC pipe cutting knife according to an embodiment of the present application;

[0019] Figure 6 This is an exploded schematic diagram of a limit plate and a blade assembly in a PVC pipe cutting knife according to an embodiment of the present application;

[0020] Figure 7 It is a schematic diagram of the force of a PVC pipe cutting knife cutting a pipe according to an embodiment of the present application.

[0021] Explanation of the accompanying drawings: 1. Fixed handle; 2. Blade assembly; 21. Blade; 22. Blade seat; 23. Limit plate; 3. Movable handle; 4. Mounting shaft; 5. Sliding hole; 6. End cover; 7. Mounting hole; 8. Limit ball; 14. Limit groove; 15. Connecting bolt; 16. Plug-in part; 17. Plug-in groove. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-7 This application is described in further detail.

[0023] The present application embodiment discloses a PVC pipe cutting knife. Figure 1 , Figure 2 and Figure 3 The PVC pipe cutting knife comprises a fixed handle 1, a movable handle 3 and a blade assembly 2, the blade assembly 2 comprises a blade 21, a knife seat 22 and a limiting plate 23, the blade 21 and the knife seat 22 are located between the limiting plates 23 on both sides, the limiting plate 23 is rotatably arranged on the movable handle 3, the blade 21 is clamped on the knife seat 22, further, a plug-in portion 16 is arranged on the knife seat 22, a plug-in slot 17 for the plug-in portion 16 to be plugged in is provided on the blade 21, a mounting shaft 4 is slidably penetrated on the limiting plate 23, the mounting shaft 4 passes through the blade 21, an end cover 6 is provided at one end of the mounting shaft 4, the end cover 6 abuts against the limiting plate 23, a limiting ball 8 is slidably arranged on the mounting shaft 4, the sliding direction of the limiting ball 8 is perpendicular to the axial direction of the mounting shaft 4, a limiting groove 14 for the limiting ball 8 to be clamped is provided on the limiting plate 23 away from the end cover 6, and the blade 21 is located between the limiting ball 8 and the limiting plate 23 close to the end cover 6;

[0024] Combination Figure 4 , Figure 5and Figure 6 The limiting plates 23 on both sides are provided with sliding holes 5 for the installation shaft 4 to slide through, and the blade 21 is provided with a mounting hole 7 for the installation shaft 4 to slide through, and the mounting hole 7 is coaxial with the sliding hole 5.

[0025] In the embodiments of this application, refer to Figure 6 and Figure 7 Under the action of the limiting plates 23 on both sides, the front and rear positions of the blade 21 and the knife seat 22 are limited. The limiting plates 23 are rotatably set on the movable handle 3 and the blade 21 and the knife seat 22 are plugged together to limit the left and right positions of the blade 21 and the knife seat 22. Under the action of the mounting shaft 4, the upper and lower positions of the blade 21 and the knife seat 22 are limited, thereby facilitating the cutting knife to perform cutting operations.

[0026] When replacing the blade 21, pull the end cover 6 or press the mounting shaft 4, and the mounting shaft 4 moves toward the direction of the end cover 6. During the movement of the mounting shaft 4, the limiting ball 8 abuts against the mounting hole 7 on the blade 21, and the limiting ball 8 has a movement tendency toward the inside of the mounting shaft 4. After the limiting ball 8 enters the mounting shaft 4, the limiting ball 8 passes through the mounting hole 7 and separates from the limiting plate 23. Then the blade 21 is removed, and the replaced blade 21 is installed between the limiting plates 23, and then the mounting shaft 4 is inserted into the limiting plate 23. After the limiting ball 8 passes through the mounting hole 7, the limiting ball 8 slides out from the mounting shaft 4, and the blade 21 is clamped between the limiting ball 8 and the limiting plate 23, and the blade 21 is replaced. The operation is simple and convenient.

[0027] Reference Figure 3 and Figure 6 In the embodiment of the present application, a slide groove is provided on the side wall of the mounting shaft 4, and the axial direction of the slide groove is perpendicular to the axial direction of the mounting shaft 4. The limiting ball 8 is slidably arranged in the slide groove, and a spring is arranged on the mounting shaft 4 through the slide groove, one end of the spring is fixedly arranged at the bottom of the slide groove, and the other end is fixedly arranged on the limiting ball 8; after the limiting ball 8 is clamped in the limiting groove 14, the limiting ball 8 abuts against the side wall of the blade 21 under the action of the spring. When replacing the blade 21, the mounting shaft 4 is pulled, and the mounting shaft 4 drives the limiting ball 8 to squeeze the blade 21, and the limiting ball 8 relatively enters the slide groove, thereby removing the mounting shaft 4 from the limiting plate 23, and the operation is simple and convenient; when installing the blade 21, the mounting shaft 4 is inserted into the sliding hole 5 and the mounting hole 7, and the limiting ball 8 passes through the sliding and mounting holes 7 in turn and is clamped in the limiting groove 14, completing the installation of the blade 21, and the operation is simple and convenient.

[0028] Further, see Figure 5 and Figure 6 A connecting bolt 15 is provided on the movable handle 3, and the connecting bolt 15 passes through the limiting plate 23 and the knife seat 22. The limiting plate 23 away from the connecting bolt 15 is threadedly connected to the connecting bolt 15, and the knife seat 22 is rotatably connected to the connecting bolt 15.

[0029] The implementation principle of a PVC pipe cutting knife in the embodiment of the present application is:

[0030] When replacing the blade 21, pull the end cover 6 or press the mounting shaft 4, and the mounting shaft 4 moves toward the direction of the end cover 6. During the movement of the mounting shaft 4, the limiting ball 8 abuts against the mounting hole 7 on the blade 21, and the limiting ball 8 has a movement tendency toward the inside of the mounting shaft 4. After the limiting ball 8 enters the mounting shaft 4, the limiting ball 8 passes through the mounting hole 7 and is separated from the limiting plate 3. Then the blade 21 is removed, and the replaced blade 21 is installed between the limiting plates 3, and then the mounting shaft 4 is inserted into the limiting plate 3. After the limiting ball 8 passes through the mounting hole 7, the limiting ball 8 slides out from the mounting shaft 4, and the blade 21 is clamped between the limiting ball 8 and the limiting plate 3, and the blade 21 is replaced. The operation is simple and convenient.

[0031] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A PVC pipe cutting knife, characterized by: The invention comprises a fixed handle (1), a movable handle (3) and a blade assembly (2), wherein the blade assembly (2) comprises a blade (21), a blade holder (22) and a limiting plate (23), wherein the movable handle (3) is hinged on the fixed handle (1), the blade (21) and the blade holder (22) are located between the limiting plates (23) on both sides, the limiting plates (23) are rotatably arranged on the movable handle (3), the blade (21) is clamped on the blade holder (22), and a mounting shaft (4) is slidably penetrated on the limiting plate (23), The installation shaft (4) passes through the blade (21); an end cover (6) is provided at one end of the installation shaft (4); the end cover (6) abuts against a limit plate (23); a limit ball (8) is slidably provided on the installation shaft (4); the sliding direction of the limit ball (8) is perpendicular to the axial direction of the installation shaft (4); a limit groove (14) for the limit ball (8) to be engaged is provided on the limit plate (23) away from the end cover (6); and the blade (21) is located between the limit ball (8) and the limit plate (23) close to the end cover (6).

2. A PVC pipe cutting knife according to claim 1, characterized in that: The blade seat (22) is provided with an inserting portion (16), and the blade (21) is provided with an inserting groove (17) for the inserting portion (16) to be inserted.

3. A PVC pipe cutting knife according to claim 1, characterized in that: A sliding groove is provided on the side wall of the installation shaft (4), and the limiting ball (8) is slidably arranged in the sliding groove. A spring is arranged on the installation shaft (4) through the sliding groove, and one end of the spring is fixedly arranged at the bottom of the sliding groove, and the other end is fixedly arranged on the limiting ball (8).

4. A PVC pipe cutting knife according to claim 1, characterized in that: The movable handle (3) is provided with a connecting bolt (15), the connecting bolt (15) passes through a limiting plate (23) and a knife seat (22), the limiting plate (23) away from the connecting bolt (15) is threadedly connected to the connecting bolt (15), and the knife seat (22) is rotatably connected to the connecting bolt (15).

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