Quick-release type water pipe scissors

Abstract

The utility model provides a pair of quick-release water pipe scissors, which comprises a shell and a blade hinged in the shell through a hand-screwing fastener, and the hand-screwing fastener is used for realizing quick release of the blade; an annular protrusion is arranged on the portion, corresponding to the periphery of the hand-screwing fastener, of the inner wall of the shell, a coil spring is installed in the annular protrusion, and the coil spring is used for rotation reset of the blade. A fixed column is arranged in the annular protrusion, an open groove communicated with the outside is formed in the blade, the fixed column is sleeved with the fixed end of the inner side of the coil spring, and the movable end of the outer side of the coil spring is arranged in the open groove after being pre-tightened; according to the quick-disassembly type water pipe scissors, the defects that an existing pipe cutter is not compact enough in structure, and the blades cannot be quickly disassembled and assembled are overcome.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of pipe cutter, in particular to a quick release type water pipe scissors. BACKGROUND

[0002] In the field of pipeline installation and maintenance, pipe cutter is a commonly used tool. Pipe cutter (also known as pipe cutter) is one of the tools frequently used in pipe fitting engineering, and the main purpose is to cut the pipe body into segments.

[0003] For example, patent number CN210282381U discloses a pipe cutter, which comprises a cutter shell, a pipe cutter blade and a movable handle. A lock cutter pawl is hinged in the cutter shell. A push cutter pawl is hinged in the movable handle. A limiting tooth part is arranged on the upper end of the push cutter pawl. The limiting tooth part abuts against the push cutter pawl, so that the push cutter pawl can be accurately placed in the ratchet tooth groove of the pipe cutter blade. The pipe cutter blade is hingedly installed on the first hinge flange in the cutter shell. A blade reset tension spring is installed in the cutter shell. One end of the blade reset tension spring is connected to the pipe cutter blade, and the other end is hooked on the tension spring mounting pin in the cutter shell. The tension spring mounting pin is integrally formed with the cutter shell. In the above structure, the pipe cutter blade cannot be quickly disassembled and replaced, and the pipe cutter blade is reset by the reset tension spring, which occupies a large space, making the overall structure not compact enough, which is not conducive to structure optimization and quick disassembly of the blade. SUMMARY

[0004] (I) Technical problem to be solved

[0005] The problem to be solved by the utility model is to provide a quick release type water pipe scissors to overcome the defects of the existing pipe cutter structure not being compact enough and the blade being unable to be quickly disassembled and replaced.

[0006] (II) Technical scheme

[0007] To solve the technical problem, the utility model provides a quick release type water pipe scissors, which comprises a shell and a blade hingedly connected in the shell through a hand-tightening fastener. The hand-tightening fastener is used to realize quick disassembly of the blade. An annular protrusion is arranged on the inner wall of the shell corresponding to the outer periphery of the hand-tightening fastener. A coil spring is installed in the annular protrusion. The coil spring is used for the blade to reset. A fixed column is arranged in the annular protrusion. An open slot is arranged on the blade and connected to the outside. The fixed end of the coil spring is sleeved on the fixed column. The movable end of the coil spring is placed in the open slot after being pre-tightened.

[0008] In some embodiments, a cover plate is arranged on the annular protrusion and placed between the blade and the coil spring. An arc-shaped limiting slot is arranged on the outer edge of the cover plate. The movable end is placed in the arc-shaped limiting slot and can move in the arc-shaped limiting slot.

[0009] In some embodiments, the arc-shaped limiting groove has a first limiting end configured to limit the movable end when the blade is fully closed, and a second limiting end configured to limit the movable end when the blade is fully unfolded.

[0010] In some embodiments, the center of the annular protrusion is provided with a center column, the hand-tightening fastener is arranged in the center column, an inner groove is arranged on the outer circumferential wall of the center column at a position corresponding to the fixed column, and a limiting protrusion is arranged on one side of the inner groove; the shell is provided with a first stopper and a second stopper for limiting the blade.

[0011] In some embodiments, the hand-tightening fastener comprises a fastening screw and a U-shaped hand-tightening piece hinged at the end of the fastening screw, the U-shaped hand-tightening piece is located outside the shell; a plurality of anti-loosening clamping positions are arranged on the outer wall of the shell at equal intervals in a circumferential direction of the fastening screw, and the U-shaped hand-tightening piece can be clamped on two adjacent anti-loosening clamping positions after being turned over.

[0012] In some embodiments, the hand-tightening fastener further comprises a fastening nut threadedly connected with the fastening screw, and a polygonal slot for limiting rotation of the fastening nut is formed on the outer wall of the shell; the shell comprises an upper shell and a lower shell fixed with each other, the anti-loosening clamping positions are arranged on the upper shell, the annular protrusion and the polygonal slot are arranged on the lower shell, and the blade is mounted between the upper shell and the lower shell.

[0013] In some embodiments, a movable handle is hinged on the shell, one end of the blade is provided with a toothed portion, and a driving block for pushing the toothed portion to rotate is hinged on the movable handle; a torsion spring is mounted between the driving block and the movable handle, and the torsion spring always tends to move the driving block towards the toothed portion.

[0014] In some embodiments, a ratchet block capable of being clamped with the toothed portion is hinged on the movable handle, the ratchet block is used for clamping and locking the toothed portion to prevent the blade from rotating back, a convex column is arranged in the shell, and a tension spring is mounted between the ratchet block and the shell, one end of the tension spring is hooked on the ratchet block, and the other end of the tension spring is hooked on the convex column.

[0015] In some embodiments, the blade has a pointed cutting edge, and the shell is provided with a lower recessed clamping groove corresponding to the pointed cutting edge; when an external pipe is placed in the lower recessed clamping groove, the pipe is opposite to the pointed cutting edge.

[0016] In some embodiments, the shell is mounted with a clamping piece away from one end of the blade, a rotating handle is rotatably mounted in the shell at one end of the clamping piece, and a clamping hook block configured to be clamped with the movable handle is arranged at the other end of the clamping piece.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, the quick-release water pipe scissors have the following advantages:

[0019] 1) The blade is reset by a coil spring, the coil spring only occupies a plane space, so that the overall structure is compact and beneficial to structural optimization; the coil spring can store more torsion and bear a larger load, has stable performance, is safer and more reliable than a pure tension spring or torsion spring, and has a better and more comfortable hand feeling in use.

[0020] 2) The blade can be quickly disassembled and assembled in a fastener mode combined with the coil spring, the blade is in a fully open state during disassembly, the fastening screw is separated from the fastening nut by turning the U-shaped hand-tightening piece, and then the blade can be pulled out; during assembly, the blade is inserted into the shell, the movable end is conveniently clamped into the opening groove because the movable end is abutted against the second limiting end, and operation is simple and convenient.

[0021] 3) A plurality of anti-loosening clamping positions are arranged on the shell at equal intervals in a ring shape, the U-shaped hand-tightening piece can be clamped on the anti-loosening clamping position after being turned over, and 360-degree anti-loosening can be achieved, thereby achieving a good use effect. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Figure 1 It is a perspective view of the quick-release water pipe scissors of the utility model;

[0024] Figure 2 It is a perspective view of the quick-release water pipe scissors of the utility model from another angle;

[0025] Figure 3 It is an exploded view of the quick-release water pipe scissors of the utility model;

[0026] Figure 4 It is a perspective view of the quick-release water pipe scissors of the utility model after the blade is fully opened;

[0027] Figure 5 It is a perspective view of the quick-release water pipe scissors of the utility model in which the lower shell, the coil spring and the cover plate are connected;

[0028] Figure 6 It is a perspective view of the quick-release type water pipe scissors cover plate of the utility model;

[0029] Figure 7 It is a perspective view of the quick-release type water pipe scissors lower shell and coil spring connection of the utility model;

[0030] Figure 8 It is a perspective view of the quick-release type water pipe scissors blade and ratchet block connection of the utility model;

[0031] Figure 9 It is a perspective view of the quick-release type water pipe scissors cutting of the utility model;

[0032] The corresponding component names of various reference numerals in the figure are as follows: 1, shell; 11, upper shell; 12, lower shell; 101, annular protrusion; 102, fixed column; 103, center column; 104, inner groove; 105, limiting protrusion; 106, anti-loosening check; 107, polygonal groove; 108, convex column; 109, lower concave clamping groove; 110, first stop block; 111, second stop block; 2, hand-tightening fastener; 21, fastening screw; 22, U-shaped hand-tightening piece; 23, fastening nut; 3, blade; 301, open slot; 302, tooth part; 303, sharp end cutting edge; 4, coil spring; 401, fixed end; 402, movable end; 5, cover plate; 501, arc-shaped limiting groove; 502, first limiting end; 503, second limiting end; 6, movable handle; 61, driving block; 62, torsional spring; 63, ratchet block; 64, tension spring; 7, clamping piece; 701, pulley; 702, clamping hook block. DETAILED DESCRIPTION

[0033] The present application will be described in detail below with reference to the drawings and specific embodiments.

[0034] The embodiments of the present application will be described below through specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification. Obviously, the described embodiments are only some of the embodiments of the present application, not all. The present application can also be implemented or applied through other different specific embodiments, and each detail in the specification can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0035] It is to be understood that the embodiments described hereinbelow within the scope of the appended claims. It will be apparent to one of ordinary skill in the art that aspects described herein can be implemented in a wide variety of forms, and that any specific structure and / or function described herein is merely illustrative. An aspect described herein can be implemented alone or in combination with any other aspect(s). For example, an apparatus can be implemented using any number and combination of the aspects set forth herein. Additionally, an apparatus can be implemented using other structures and / or functionalities in addition to or instead of one or more of the aspects set forth herein.

[0036] It is also to be understood that the diagrams provided in the following embodiments are only schematic and that the drawings for the purpose of illustration only. There is usually a plurality of components in the drawings, and its shape, number, and size are not drawn according to the actual implementation, and the shape, number, and size of each component in the actual implementation can be a random change, and the layout of the components can be more complex.

[0037] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, one skilled in the art will understand that the examples can be practiced without these specific details.

[0038] The technical solutions provided by the embodiments of the present application are described below in conjunction with the drawings.

[0039] Referring to Figures 1 to 9 The utility model provides a kind of quick-release water pipe scissors, including shell 1 and blade 3 being hinged in shell 1 by hand screw fastener 2, through hole for hand screw fastener 2 to pass through is provided on blade 3, blade 3 rotates with hand screw fastener 2 as pivot, hand screw fastener 2 is used to realize the quick disassembly of blade 3, hand screw fastener 2 can be disassembled from shell 1 by manual mode, to facilitate the disassembly of blade 3.

[0040] Referring to Figure 3 , Figure 4 And Figure 7The inner wall of the shell 1 is provided with an annular protrusion 101 corresponding to the outer periphery of the hand-tightening fastener 2, a coil spring 4 is mounted in the annular protrusion 101, and the coil spring 4 is used for rotary reset of the blade 3; the coil spring 4 is used for rotary reset of the blade 3, the coil spring 41 only occupies a plane space, occupies a smaller volume, makes the overall structure more compact, and is beneficial to structure optimization; the coil spring can store more torsion and bear larger load, has stable performance, is safer and more reliable than a pure tension spring or a torsion spring, has better use feeling, and is more comfortable. The annular protrusion 101 is provided with a fixed column 102, the annular protrusion 101 and the fixed column 102 can be designed in an integral structure with the shell 1, the blade 3 is provided with an open slot 301 communicating with the outside, the open slot 301 facilitates insertion or extraction of the movable end 402, and facilitates disassembly and assembly of the blade 3. The coil spring 4 has a fixed end 401 on the inner side and a movable end 402 on the outer side, the fixed end 401 is sleeved on the fixed column 102 after being bent, and the movable end 402 is placed in the open slot 301 after being pre-tightened.

[0041] In some embodiments, as shown in Figure 5 and Figure 6 , a cover plate 5 is combined on the annular protrusion 101, the cover plate 5 is used for shielding the limiting coil spring 4, and the cover plate 5 is placed between the blade 3 and the coil spring 4. An arc-shaped limiting slot 501 is formed in the outer edge of the cover plate 5, the movable end 402 is placed in the arc-shaped limiting slot 501, and the movable end 402 can move in the arc-shaped limiting slot 501 under the driving of the blade 3.

[0042] In some embodiments, as shown in Figures 4 to 6 , the arc-shaped limiting slot 501 has a first limiting end 502 and a second limiting end 503, the first limiting end 502 is configured to limit the movable end 402 when the blade 3 is completely closed, that is, the movable end 402 is abutted on the first limiting end 502 when the blade 3 is completely closed, and the second limiting end 503 is configured to limit the movable end 402 when the blade 3 is completely unfolded, that is, the movable end 402 is abutted on the second limiting end 503 when the blade 3 is completely unfolded. As shown in Figure 4 , the blade 3 needs to be placed in a completely unfolded state when the blade is replaced, at this time, the movable end 402 is abutted on the second limiting end 503, and the open slot 301 faces downward, after the hand-tightening fastener 2 is disassembled, the blade can be directly pulled out to the side upward, in the installation, the blade can be directly inserted to the side downward, the open slot 301 is more convenient to be clamped into the movable end 402, and the disassembly and assembly are simple and convenient.

[0043] In some embodiments, as shown in Figure 4 and Figure 5As shown, the center of the annular protrusion 101 is provided with a center column 103, the hand-tightening fastener 2 is arranged in the center column 103, and the cover plate 5 is provided with a through hole matched with the center column 103. The outer circumferential wall of the center column 103 is provided with an inner groove 104 at the position corresponding to the fixing column 102. The inner groove 104 is arranged to facilitate the hooking of the fixing end 401 on the fixing column 102. One side of the inner groove 104 is provided with a limiting protrusion 105. The limiting protrusion 105 can limit the coil spring when the coil spring is wound, prevent the coil spring from fatigue deformation, and prolong the service life. The shell 1 is provided with a first stop block 110 and a second stop block 111 for limiting the blade 3. The first stop block 110 is used to limit the blade when the blade is fully unfolded, and the second stop block 111 is used to limit the blade when the blade is fully closed. The first stop block 110 and the second stop block 111 can be designed in an integral structure with the shell.

[0044] In some embodiments, as shown in Figure 1 , Figure 3 and Figure 9 , the hand-tightening fastener 2 includes a fastening screw 21 and a U-shaped hand-tightening piece 22 hinged at the end of the fastening screw 21, and the U-shaped hand-tightening piece 22 is located outside the shell 1. A plurality of anti-loosening clamping positions 106 are arranged on the outer wall of the shell 1 at equal intervals in the circumferential direction of the fastening screw 21. The U-shaped hand-tightening piece 22 can be clamped on two adjacent anti-loosening clamping positions 106 after being turned over. This structure uses the annularly arranged anti-loosening clamping positions 106 to achieve 360-degree anti-loosening of the fastening screw 21, and has good anti-loosening effect. The anti-loosening clamping positions 106 and the shell 1 can be designed in an integral structure.

[0045] In some embodiments, as shown in Figures 1 to 3 , the hand-tightening fastener 2 further includes a fastening nut 23 threadedly connected with the fastening screw 21, and the outer wall of the shell 1 is provided with a polygonal groove 107 for limiting the rotation of the fastening nut 23; the polygonal groove 107 is matched with the outer contour of the fastening nut 23, so that the fastening nut 23 cannot rotate when the fastening screw 21 is screwed. The shell 1 includes an upper shell 11 and a lower shell 12 fixed to each other. The upper shell 11 and the lower shell 12 are similar in shape. The anti-loosening clamping positions 106 are arranged on the upper shell 11, the annular protrusion 101 and the polygonal groove 107 are arranged on the lower shell 12, and the blade 3 is mounted between the upper shell 11 and the lower shell 12.

[0046] In some embodiments, as shown in Figures 1 to 3 and Figure 8As shown, the side of the shell 1 is hinged with a movable handle 6, one end of the blade 3 is provided with a tooth part 302, the movable handle 6 is hinged with a driving block 61 for pushing the tooth part 302 to rotate; a torsion spring 62 is installed between the driving block 61 and the movable handle 6, the torsion spring 62 always makes the driving block 61 have a tendency to move towards the tooth part 302. The movable handle 6 is hinged with a ratchet block 63 which can be clamped with the tooth part 302, the ratchet block 63 is used for clamping and locking the tooth part 302 to prevent the blade 3 from rotating; a convex column 108 is arranged in the shell 1, a tension spring 64 is installed between the ratchet block 63 and the shell 1, one end of the tension spring 64 is hooked on the ratchet block 63, and the other end of the tension spring 64 is hooked on the convex column 108. When cutting the pipe, the movable handle 6 can drive the driving block 61, the driving block 61 pushes the tooth part 302 to make the blade 3 move towards the shell, and the movable handle 6 can push the tooth part 302 for several times, which is more labor-saving for cutting; the arrangement of the ratchet block 63 can prevent the blade 3 from rotating.

[0047] In some embodiments, as shown in Figure 8 and Figure 9 The blade 3 has a pointed cutting edge 303, and the two sides of the pointed cutting edge 303 are provided with cutting edges; the shell 1 is provided with a lower recessed clamping groove 109 corresponding to the pointed cutting edge 303; when the external pipe is placed in the lower recessed clamping groove 109, the pipe is opposite to the pointed cutting edge 303. With this structure, when cutting, the pointed cutting edge 303 can first contact the pipe, which is more labor-saving for cutting.

[0048] In some embodiments, as shown in Figure 2 and Figure 3 The end of the shell 1 away from the blade 3 is installed with a clamping piece 7, the end of the clamping piece 7 is rotatably installed in the shell 1 as a rotating wheel 701, and the other end is provided with a clamping hook block 702 which can be clamped with the movable handle 6. The clamping hook block 702 can clamp the movable handle 6, and when storing, the movable handle 6 can be kept in a closed state; by rotating the rotating wheel 701, the clamping hook block 702 can be separated from the movable handle 6, which is convenient for opening the movable handle 6.

[0049] In the specification, the same or similar parts of each embodiment can be referred to each other, and each embodiment focuses on the difference from other embodiments.

[0050] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A quick-release pipe shears, characterized in that: The device includes a housing (1) and a blade (3) hinged in the housing (1) by a hand-tightening fastener (2). The hand-tightening fastener (2) is used to enable quick disassembly of the blade (3). The inner wall of the housing (1) is provided with an annular protrusion (101) on the outer periphery corresponding to the hand-tightening fastener (2). A coil spring (4) is installed in the annular protrusion (101). The coil spring (4) is used for the blade (3) to rotate and reset. A fixing post (102) is provided in the annular protrusion (101). An opening groove (301) communicating with the outside is provided on the blade (3). The fixing end (401) on the inner side of the coil spring (4) is fitted on the fixing post (102). The movable end (402) on the outer side of the coil spring (4) is pre-tightened and placed in the opening groove (301).

2. The quick-release pipe shears as described in claim 1, characterized in that: The annular protrusion (101) is covered with a cover plate (5), which is placed between the blade (3) and the coil spring (4); the outer edge of the cover plate (5) is provided with an arc-shaped limiting groove (501), and the movable end (402) is placed in the arc-shaped limiting groove (501) and can move within the arc-shaped limiting groove (501).

3. The quick-release pipe shears as described in claim 2, characterized in that: The arc-shaped limiting groove (501) has a first limiting end (502) and a second limiting end (503). The first limiting end (502) is configured to limit the movable end (402) when the blade (3) is fully closed, and the second limiting end (503) is configured to limit the movable end (402) when the blade (3) is fully extended.

4. The quick-release pipe shears as described in claim 2, characterized in that: A central post (103) is provided at the center of the annular protrusion (101), and the hand-tightening fastener (2) passes through the central post (103); the outer circumferential wall of the central post (103) is provided with an inner groove (104) at the position corresponding to the fixed post (102), and a limiting protrusion (105) is provided on one side of the inner groove (104); a first stop (110) and a second stop (111) for limiting the blade (3) are provided inside the housing (1).

5. The quick-release pipe shears as described in claim 1, characterized in that: The hand-tightening fastener (2) includes a fastening screw (21) and a U-shaped hand-tightening component (22) hinged to the end of the fastening screw (21). The U-shaped hand-tightening component (22) is located on the outside of the housing (1). On the outer wall of the housing (1), a plurality of anti-loosening slots (106) are provided at equal intervals in a ring around the outer periphery of the fastening screw (21). After the U-shaped hand-tightening component (22) is flipped over, it can be locked onto two adjacent anti-loosening slots (106).

6. The quick-release pipe shears as described in claim 5, characterized in that: The hand-tightening fastener (2) also includes a fastening nut (23) threadedly connected to the fastening screw (21). A polygonal groove (107) for restricting the rotation of the fastening nut (23) is provided on the outer wall of the housing (1). The housing (1) includes an upper housing (11) and a lower housing (12) fixed to each other. The anti-loosening latch (106) is provided on the upper housing (11). The annular protrusion (101) and the polygonal groove (107) are provided on the lower housing (12). The blade (3) is installed between the upper housing (11) and the lower housing (12).

7. The quick-release pipe shears as described in claim 1, characterized in that: A movable handle (6) is hinged to the housing (1). One end of the blade (3) is provided with a tooth (302). A drive block (61) for driving the tooth (302) to rotate is hinged to the movable handle (6). A torsion spring (62) is installed between the drive block (61) and the movable handle (6). The torsion spring (62) always makes the drive block (61) tend to move toward the tooth (302).

8. The quick-release pipe shears as described in claim 7, characterized in that: The movable handle (6) is hinged with a ratchet block (63) that can engage with the teeth (302). The ratchet block (63) is used to engage and lock the teeth (302) to prevent the blade (3) from rotating. A protrusion (108) is provided inside the housing (1). A tension spring (64) is installed between the ratchet block (63) and the housing (1). One end of the tension spring (64) is hooked on the ratchet block (63), and the other end is hooked on the protrusion (108).

9. The quick-release pipe shears as described in claim 1, characterized in that: The blade (3) has a pointed cutting edge (303), and the housing (1) is provided with a recessed groove (109) corresponding to the pointed cutting edge (303); when the external tube is placed in the recessed groove (109), the tube is opposite to the pointed cutting edge (303).

10. The quick-release pipe shears as described in claim 7, characterized in that: A snap-fit ​​component (7) is installed at one end of the housing (1) away from the blade (3). A dial (701) at one end of the snap-fit ​​component (7) is rotatably installed inside the housing (1), and a hook block (702) is provided at the other end of the snap-fit ​​component (7) that can be snapped with the movable handle (6).

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