A blade quick-change pipe cutting tool

Abstract

The application provides a blade quick-change pipe cutting knife, which comprises a fixed handle, a movable handle and a blade which is detachably installed on the movable handle, the movable handle is hingedly connected with the fixed handle, and a blade slot is arranged in the movable handle, the blade is inserted into the blade slot, a positioning bolt is inserted into one side of the movable handle, a positioning hole is arranged through the blade, a tapered positioning platform is arranged on the end of the positioning bolt, and the positioning bolt passes through the positioning hole and the positioning platform abuts against the inner wall of the positioning hole. The blade quick-change pipe cutting knife provided by the application is locked by the tapered positioning platform on the positioning bolt and the positioning hole on the blade after assembly, so that vibration or deviation of the blade during use is reduced, the shearing efficiency is improved, the service life of the blade is prolonged, the blade can be pulled out and disassembled by rotating the positioning bolt to make the positioning platform of the positioning bolt disengage from the positioning hole, the blade is convenient to replace, and the two ends of the blade are symmetrical and can be used.

Description

Technical Field

[0001] This application relates to the field of pipe cutter technology, specifically to a quick-change pipe cutter. Background Technology

[0002] Pipe cutters are commonly used tools in piping engineering, primarily for cutting pipes into sections for connecting electrical, water, and gas pipelines. Patent application CN201721324401.8 discloses a pipe cutter comprising a clamp-like body consisting of a housing and a handle. The clamp-like body contains a matching blade, a retraction torsion spring, a locking pawl, and a pushing pawl. A second handle shaft rotatably connects the housing and handle. The locking pawl is positioned and penetrates the head end of the handle via the second handle shaft, and the pushing pawl is also penetrated and connected to the head end of the handle via a first handle shaft. The blade has multiple positioning ratchet teeth on its outer edge and a blade retraction groove. A retraction torsion spring is also housed within the housing via a retraction torsion spring pin. The retraction torsion spring includes a fixed end and a rotating arm. The fixed end abuts against the inner wall or rib of the housing, and the rotating arm abuts against the blade retraction groove. The pipe cutter needs to position the assembled blade using a blade shaft and torsion springs. Due to assembly requirements, the blade shaft needs to have a certain clearance, which will inevitably cause the blade to wobble during use, thus affecting the cutter's ability to cut pipes and also affecting the blade's lifespan. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] The problem to be solved by this application is to provide a quick-change pipe cutter that can overcome the defects in the prior art.

[0005] (II) Technical Solution

[0006] The embodiments in this specification provide the following technical solutions:

[0007] This specification provides a quick-change pipe cutter, including a fixed handle and a movable handle hinged together, and a blade detachably mounted on the movable handle. The movable handle has a blade groove, and the blade is inserted into the blade groove. A positioning bolt is inserted into one side of the movable handle. A positioning hole is provided through the blade. The end of the positioning bolt has a tapered positioning platform. The positioning bolt passes through the positioning hole, and the positioning platform abuts against the inner wall of the positioning hole, preventing the blade from wobbling. Rotating the positioning bolt disengages the positioning platform from the positioning hole, allowing the blade to be detached.

[0008] In some embodiments, hinge platforms are symmetrically provided on both sides of the movable handle, and hinge holes are symmetrically provided on both sides of the fixed handle. The hinge platforms are placed in the hinge holes, and a mounting groove is provided on one side of the hinge platform of the movable handle. The positioning bolt is placed in the mounting groove through a threaded connection.

[0009] In some embodiments, the blade has symmetrical structures at both ends and is provided with positioning holes, and both ends of the blade are provided with positioning grooves. A first positioning post is installed inside the movable handle, and after the blade is assembled, the first positioning post is placed in the positioning groove.

[0010] In some embodiments, a second positioning post is also installed inside the movable handle, and the second positioning post abuts against one side of the blade.

[0011] In some embodiments, a torsion spring is provided between the fixed handle and the movable handle, a second positioning bolt is provided inside the fixed handle, a stop groove is provided inside the movable handle, one end of the torsion spring is fitted onto the second positioning bolt, and the other end is placed in the stop groove.

[0012] (III) Beneficial Effects

[0013] Compared with the prior art, the beneficial effects that can be achieved by the above-mentioned at least one technical solution adopted in the embodiments of this specification include at least the following: by cooperating with the positioning hole on the positioning bolt, the blade is locked by the positioning platform after assembly, which can reduce vibration or displacement during use, thereby improving the shearing efficiency and extending the service life of the blade. Moreover, the blade can be pulled out and disassembled simply by turning the positioning bolt to disengage the positioning platform from the positioning hole, making blade replacement convenient. In addition, the blade is symmetrical at both ends and can be used at both ends. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a perspective view in this application;

[0016] Figure 2 This is a sectional view of the positioning bolt in this application;

[0017] Figure 3 This is a three-dimensional view of the internal structure in this application;

[0018] Figure 4 This is a perspective view of the blade and fixed handle in this application;

[0019] Figure 5 This is a perspective view of the torsion spring mounting structure in this application;

[0020] Figure 6 This is an exploded view of the blade and positioning bolt in this application.

[0021] The component names corresponding to the various reference numerals in the figure are: 1. Fixed handle; 2. Movable handle; 3. Blade; 4. Blade groove; 5. Positioning bolt; 6. Positioning hole; 7. Positioning platform; 8. Hinge platform; 9. Hinge hole; 10. Mounting groove; 11. Positioning groove; 12. First positioning post; 13. Second positioning post; 14. Torsion spring; 15. Second positioning bolt; 16. Stop groove. Detailed Implementation

[0022] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0023] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0025] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0026] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0027] Combination Figures 1-6 As shown, this application provides a quick-change pipe cutter, including a fixed handle 1 and a movable handle 2 hinged together, and a blade 3 detachably mounted on the movable handle 2. The movable handle 2 has a blade groove 4, and the blade 3 is inserted into the blade groove 4. A positioning bolt 5 is inserted into one side of the movable handle 2. A positioning hole 6 is provided through the blade 3. The end of the positioning bolt 5 has a conical positioning platform 7. The positioning bolt 5 passes through the positioning hole 6 and the positioning platform 7 abuts against the inner wall of the positioning hole 6. Since the positioning platform 7 is conical, its side diameter gradually decreases from bottom to top. Therefore, after passing through the positioning hole 6, it can be locked, preventing the blade 3 from shaking. Rotating the positioning bolt 5 causes the positioning platform 7 to disengage from the positioning hole 6, and the blade 3 can be detached. Since the positioning bolt 5 fixes the blade 3 through the positioning platform 7, it is only necessary to unscrew the positioning bolt 5 partially to disengage the positioning platform 7 from the blade 3 to complete the disassembly. It is not necessary to remove the positioning bolt 5 as a whole, making disassembly more convenient.

[0028] In some embodiments, such as Figure 1 and Figure 2 As shown, hinge platforms 8 are symmetrically provided on both sides of the movable handle 2, and hinge holes 9 are symmetrically provided on both sides of the fixed handle 1. The hinge platforms 8 are placed in the hinge holes 9. A mounting groove 10 is provided on the hinge platform 8 on one side of the movable handle 2. The positioning bolt 5 is placed in the mounting groove 10 through a threaded connection. The positioning bolt 5 can be unscrewed with a screwdriver.

[0029] In some embodiments, such as Figures 3-6As shown, the blade 3 has symmetrical structures at both ends and is provided with positioning holes 6. Both ends of the blade 3 are provided with positioning grooves 11. A first positioning post 12 is installed in the movable handle 2. After the blade 3 is assembled, the first positioning post 12 is placed in the positioning groove 11 to position the blade 3. A second positioning post 13 is also installed in the movable handle 2. The second positioning post 13 abuts against one side of the blade 3 to facilitate the blade 3 to be aligned and inserted into the blade groove 4. In this embodiment, a torsion spring 14 is provided between the fixed handle 1 and the movable handle 2. A second positioning bolt 15 is provided in the fixed handle 1. A stop groove 16 is provided in the movable handle 2. One end of the torsion spring 14 is fitted on the second positioning bolt 15, and the other end is placed in the stop groove 16. The torsion spring 14 can push the movable handle 2 to reset, and the second positioning bolt 15 can prevent the torsion spring 14 from falling off.

[0030] In this specification, the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the descriptions of the embodiments described later are relatively simple, and relevant parts can be referred to the descriptions of the foregoing embodiments.

[0031] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A quick-change pipe cutter, comprising a fixed handle (1) hinged to each other, a movable handle (2), and a blade (3) detachably mounted on the movable handle (2), characterized in that: The movable handle (2) is provided with a blade groove (4), and the blade (3) is inserted into the blade groove (4). A positioning bolt (5) is inserted into one side of the movable handle (2). A positioning hole (6) is provided through the blade (3). A tapered positioning platform (7) is provided at the end of the positioning bolt (5). The positioning bolt (5) passes through the positioning hole (6) and the positioning platform (7) abuts against the inner wall of the positioning hole (6), so that the blade (3) cannot shake. Rotating the positioning bolt (5) causes the positioning platform (7) to disengage from the positioning hole (6), and the blade (3) can be disassembled.

2. The quick-change pipe cutter according to claim 1, characterized in that, The movable handle (2) is provided with hinge platforms (8) symmetrically on both sides, and the fixed handle (1) is provided with hinge holes (9) symmetrically on both sides, with the hinge platforms (8) placed inside the hinge holes (9).

3. The quick-change pipe cutter according to claim 2, characterized in that, The hinge platform (8) on one side of the movable handle (2) is provided with a mounting groove (10), and the positioning bolt (5) is placed in the mounting groove (10) by threaded connection.

4. The quick-change pipe cutter according to claim 1, characterized in that, The blade (3) has symmetrical structures at both ends and is provided with positioning holes (6).

5. The quick-change pipe cutter according to claim 4, characterized in that, Both ends of the blade (3) are provided with positioning grooves (11), and the movable handle (2) is equipped with a first positioning post (12). After the blade (3) is assembled, the first positioning post (12) is placed in the positioning groove (11).

6. The quick-change pipe cutter according to claim 1, characterized in that, The movable handle (2) is also equipped with a second positioning post (13), which abuts against one side of the blade (3).

7. The quick-change pipe cutter according to claim 1, characterized in that, A torsion spring (14) is provided between the fixed handle (1) and the movable handle (2).

8. The quick-change pipe cutter according to claim 7, characterized in that, The fixed handle (1) is provided with a second positioning bolt (15), the movable handle (2) is provided with a stop groove (16), one end of the torsion spring (14) is fitted on the second positioning bolt (15), and the other end is placed in the stop groove (16).

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