CN214490674U

CN214490674U - PVC pipe cutter

Info

Publication number: CN214490674U
Application number: CN202022805503.XU
Authority: CN
Inventors: 鲁剑波
Original assignee: Zhejiang Bosi Bichuan Yinzhou Technology Co ltd
Current assignee: Ningbo Shiji Bosi Tools Co ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-10-26
Anticipated expiration: 2030-11-27

Abstract

The utility model provides a PVC pipe cutting knife, includes that left handle and right handle articulate the cutting knife main part that forms each other and a handle upper portion forms the tube seat and is fixed with the blade on another handle relatively, its characterized in that: at least one of the front and back surfaces of the rear side of the knife edge of the blade is formed with a thinned concave surface for reducing the contact between the blade and the PVC pipe. The blade is a toothed blade, and the blade is thinned at the rear end of the blade edge, so that when the pipe is cut, the blade can be prevented from contacting the pipe in a large area, the extrusion feeling is reduced, and the function of quickly and lightly shearing the pipe is realized. The utility model discloses the structure is more reasonable, the operation is light laborsaving more, and the cost of manufacture is also lower simultaneously.

Description

PVC pipe cutter

Technical Field

The utility model relates to a cutting tool, concretely relates to laborsaving formula PVC pipe cutting knife of cutting pipe.

Background

The pipe cutter can be applied to cutting of pipelines made of various materials and has the advantages of large diameter span range and no cutting chips. The PVC pipe cutter is mainly used for cutting PVC pipes, and most of the existing PVC pipe cutters are of a caliper type and mainly comprise a large handle, a small handle, a push pawl, a pull pawl, a tail buckle, a plurality of springs, a blade, a ratchet and the like. Then, the existing PVC pipe cutter has the defects of labor-consuming cutting and not light and handy use, and has the disadvantages of labor-consuming operation and low efficiency.

According to the examination, the Chinese patent with the prior patent number of CN200720107773.5, namely a portable quick automatic tool withdrawal clamp type PVC pipe cutter, comprises a clamp type body consisting of a small handle and a large handle, and a blade, a ratchet piece, a large screw, an adjusting block and a matched adjusting block pressure spring which are assembled; the small handle and the big handle are connected through a pin column to realize movable connection; the blade and the ratchet piece are positioned through the positioning pin and the positioning hole of the blade and the ratchet piece, and are fixed into a component by two blade screws; then the big screw is tightly pressed on the big handle and can rotate; the adjusting block is connected to the large handle through a spring pin and is compressed by a pressure spring of the adjusting block. When the pushing pawl pushes the ratchet piece, the blade makes a circular feed motion along with the pushing pawl to realize the action of cutting the pipe, and when the pushing pawl pushes the ratchet piece to advance one step, the pulling pawl hooks the ratchet piece to prevent the blade from retreating. When the knife is retracted, the plastic tail buckle is rotated to the large handle. The PVC pipe cutter has improved switching speed of the cutter, but the cutting is not labor-saving enough, and further improvement is needed.

Disclosure of Invention

The utility model aims to solve the technical problem that a PVC pipe cutting knife that the structure is more reasonable, the operation is light and handy more is provided to foretell technical current situation.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a PVC pipe cutting knife, includes that left handle and right handle articulate the cutting knife main part that forms each other and a handle upper portion forms the tube seat and is fixed with the blade on another handle relatively, its characterized in that: at least one of the front and back surfaces of the rear side of the knife edge of the blade is formed with a thinned concave surface for reducing the contact between the blade and the PVC pipe.

Preferably, the front and back surfaces of the back side of the knife edge of the blade are both formed with thinned concave surfaces for reducing the contact of the blade and the PVC pipe.

Preferably, the concave surface is an arc-shaped concave surface, the bottom edge adjacent to the knife edge is a straight edge, the top edge far away from the knife edge is in an arch shape, the side edges at two sides are provided with radian transitions to form a profile similar to a D shape, and the longest dimension of the arc-shaped concave surface is larger than the outer diameter of the PVC pipe.

Further, a blade groove for inserting the blade is formed in the upper end of the left handle, and the blade is arranged in the blade groove and is matched and fixed with the nut through a screw.

Further, the blade is a toothed blade with sawteeth on the lower end face, a pushing pawl which is abutted against the sawteeth on the lower end of the blade and used for controlling the blade to advance and retreat is installed in the right handle, and a stopping pawl is further installed below the blade.

As an improvement, the upper end of the right handle is provided with a U-shaped slot matched with the left handle, the U-shaped slot is provided with an upper connecting hole and a lower connecting hole in a penetrating manner, the upper portion of the left handle is provided with a connecting hole corresponding to the upper connecting hole, the upper portion of the left handle is arranged in the U-shaped slot, and the left pin penetrates through the upper connecting hole of the right handle, the large sleeve, the connecting hole of the left handle, the right through hole of the stopping pawl, the upper connecting hole of the right handle and the upper clamping groove insertion piece to connect the left handle, the right handle and the stopping pawl together.

Furthermore, the left end of the stopping pawl is connected with a short torsion spring, so that the left end of the stopping pawl has the tendency of always lifting upwards to prevent the blade from falling back in the use process.

Further, the middle part inboard of left side handle is equipped with the mounting hole of installing with short torsional spring, and short torsional spring passes through the small sleeve and installs on left side handle, and the one end of short torsional spring is equipped with the couple, and short torsional spring passes through the couple and links to each other with the left end of stopping pawl to the left end that makes the stopping pawl has the trend of upwards lifting all the time.

Furthermore, the right end of the propelling pawl is provided with a pin hole corresponding to the lower connecting hole of the right handle, the propelling pawl is fixed in the right handle through a right pin and a lower clamping groove inserting piece, and a small torsion spring is arranged in the right handle and on the left lower side of the propelling pawl, so that the left end of the propelling pawl has a tendency of always abutting against the sawteeth of the blade.

Finally, a long torsion spring is further mounted at the mounting hole of the left handle and abuts against and supports the right handle; the lower end of the left handle is provided with a lock hook which can be locked with the right handle.

Compared with the prior art, the utility model has the advantages of: the blade is a toothed blade, and the blade is thinned at the rear end of the blade edge, so that when the pipe is cut, the blade can be prevented from contacting the pipe in a large area, the extrusion feeling is reduced, and the function of quickly and lightly shearing the pipe is realized. The utility model discloses the structure is more reasonable, the operation is light laborsaving more, and the cost of manufacture is also lower simultaneously.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a schematic structural view of a blade in a state of cutting a PVC pipe;

fig. 4 is a partially enlarged view of the area a in fig. 3.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 4, a labor-saving PVC pipe cutter comprises a left handle 2 and a right handle 1 hinged to each other, a blade groove 21 for inserting a blade 3 is formed at the upper end of the left handle 2, the blade 3 is C-shaped, the blade 3 is arranged in the blade groove 21 and is fixed with a nut 13 by a screw 12, the blade 3 is a toothed blade with saw teeth 31 on the lower end surface, the front and back surfaces of the rear end of the edge of the blade 3 are formed into thinned concave surfaces 32, the concave surfaces 32 are arc-shaped concave surfaces, the bottom edge adjacent to the edge is a straight edge, the top edge far away from the edge is arc-shaped, the side edges at both sides have arc transitions to form a profile similar to the D shape, the wall thickness of the blade 3 at the concave surface 32 is controlled within a proper range, the maximum size of the concave surface 32 is usually larger than the outer diameter of a PVC pipe, so that when the PVC pipe cutter 20 is used, the cutting opening 201 of the PVC pipe 20 is not close to the surface of the blade 3, the extrusion sense is reduced, and the function of rapidly and labor-saving shearing the pipe is realized. A push pawl 4 which is abutted against the saw teeth 31 at the lower end of the blade 3 and is used for controlling the advance and retreat of the blade 3 is arranged in the right handle 2, and a backstop pawl 5 is also arranged below the blade 3. The upper end of the right handle 1 is provided with a U-shaped slot 1.1 matched with the left handle 2, the U-shaped slot 1.1 is provided with an upper connecting hole 1.2 and a lower connecting hole 1.3 in a penetrating way, the upper part of the left handle 2 is provided with a connecting hole corresponding to the upper connecting hole 1.2, the upper part of the left handle 2 is arranged in the U-shaped slot 1.1, the left pin 7 passes through the upper connecting hole 1.2 of the right handle 1, the large sleeve 10, the connecting hole of the left handle 2, the right end through hole of the backstop pawl 5, the upper connecting hole 1.2 of the right handle 1 and the upper clamping groove inserting piece 11 to connect the left handle 2, the right handle 1 and the backstop pawl 5 together. The left end of stopping pawl 5 is connected with short torsional spring 14, makes the left end of stopping pawl 5 have and upwards lifts up the trend that makes blade 5 can not return the sword whereabouts in the use all the time, concrete structure: the middle part inboard of left handle 2 is equipped with the mounting hole of installing with short torsional spring 14, and short torsional spring 14 passes through little sleeve 15 to be installed on left handle 2, and the one end of short torsional spring 14 is equipped with couple 141, and short torsional spring 14 passes through couple 141 and links to each other with the left end of stopping pawl 5 to the left end that makes stopping pawl 5 has the trend of upwards lifting all the time.

The right end of the propelling pawl 4 is provided with a pin hole corresponding to a lower connecting hole 1.3 of the right handle 1, the propelling pawl is fixed in the right handle 1 through a right pin 6 and a lower clamping groove insert piece 9, a small torsion spring 8 is arranged in the right handle 1 and below the left side of the propelling pawl 4, the small torsion spring 8 is of an inverted V-shaped structure, the small torsion spring 8 is installed in the right handle 1, one end of the small torsion spring is abutted against the right handle 1, the other end of the small torsion spring is abutted against the lower left side of the propelling pawl 4, and the left end of the propelling pawl 4 is enabled to have a tendency of always abutting against a sawtooth 31 of the blade 3 so as to control the advance and retreat of the blade 3.

In addition, a long torsion spring 16 is also arranged at the mounting hole of the left handle 2, and the long torsion spring 16 is supported against the right handle 1; a locking hook 17 which can be locked with the right handle 1 is arranged at the lower end of the left handle 2.

The specific working principle is consistent with the prior art and is not explained in more detail here.

When the PVC pipe 20 is cut, as shown in figure 3, the partial thinning of the blade 3 of the embodiment can reduce the large-area contact between the blade 3 and the PVC pipe 20, so that the cutting inlet 201 of the PVC pipe 20 is not close to the surface of the blade 3, as shown in figure 4, thereby reducing the extrusion feeling, saving more labor than the conventional PVC pipe cutter in use, and being lighter and more handy to operate.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a PVC pipe cutting knife, includes that left handle and right handle articulate the cutting knife main part that forms each other and a handle upper portion forms the tube seat and is fixed with the blade on another handle relatively, its characterized in that: at least one of the front and back surfaces of the rear side of the knife edge of the blade is formed with a thinned concave surface for reducing the contact between the blade and the PVC pipe.

2. The PVC pipe cutter according to claim 1, characterized in that: the front and the back of the rear side of the knife edge of the blade are both formed with thinned concave surfaces for reducing the contact between the blade and a PVC pipe.

3. The PVC pipe cutter according to claim 2, characterized in that: the concave surface is an arc concave surface, the bottom edge adjacent to the knife edge is a straight edge, the top edge far away from the knife edge is in an arch shape, the side edges on two sides are in arc transition to form a profile similar to a D shape, and the longest dimension of the arc concave surface is larger than the outer diameter of the PVC pipe.

4. The PVC pipe cutter according to claim 3, characterized in that: the upper end of the left handle is provided with a blade groove for inserting the blade, and the blade is arranged in the blade groove and is matched and fixed with the nut through a screw.

5. The PVC pipe cutter according to claim 4, characterized in that: the blade is a toothed blade with sawteeth on the lower end surface, a propelling pawl which is abutted against the sawteeth on the lower end of the blade and used for controlling the forward and backward movement of the blade is installed in the right handle, and a backstop pawl is further installed below the blade.

6. The PVC pipe cutter according to claim 5, characterized in that: the upper end of the right handle is provided with a U-shaped slot matched with the left handle, the U-shaped slot is provided with an upper connecting hole and a lower connecting hole in a penetrating manner, the upper portion of the left handle is provided with a connecting hole corresponding to the upper connecting hole, the upper portion of the left handle is arranged in the U-shaped slot, and the left pin penetrates through the upper connecting hole of the right handle, the large sleeve, the connecting hole of the left handle, the right end through hole of the stopping pawl, the upper connecting hole of the right handle and the upper clamping groove insertion piece to connect the left handle, the right handle and the stopping pawl together.

7. The PVC pipe cutter according to claim 6, characterized in that: the left end of the stopping pawl is connected with a short torsion spring, so that the left end of the stopping pawl has the tendency of lifting upwards all the time to prevent the blade from falling back in the use process.

8. The PVC pipe cutter according to claim 7, characterized in that: the utility model discloses a handle, including left handle, short torsional spring, couple, backstop pawl, the middle part inboard of left handle is equipped with the mounting hole of installing with short torsional spring, and short torsional spring passes through the little sleeve to be installed on left handle, and the one end of short torsional spring is equipped with the couple, and short torsional spring passes through the couple and links to each other with the left end of backstop pawl to the left end that makes the backstop pawl has the trend of upwards lifting up all the time.

9. The PVC pipe cutter according to claim 8, characterized in that: the right end of the propelling pawl is provided with a pin hole corresponding to the lower connecting hole of the right handle, the propelling pawl is fixed in the right handle through a right pin and a lower clamping groove inserting piece, and a small torsion spring is arranged in the right handle and below the left side of the propelling pawl, so that the left end of the propelling pawl has a tendency of always abutting against the sawteeth of the blade.

10. The PVC pipe cutter according to any one of claims 1 to 9, characterized in that: the left handle is characterized in that a long torsion spring is further mounted at the mounting hole of the left handle and supported against the right handle, and a locking hook capable of being locked with the right handle is arranged at the lower end of the left handle.