CN214136144U - Pipe cutter - Google Patents

Abstract

The utility model provides a pipe cutting knife, including casing, first support, second support, first backing roll, second backing roll, cutting piece, regulating part, the regulating part drives the motion of second support through first support to adjust the position relation between first backing roll, second backing roll and the cutting piece. The utility model provides a pipe cutting knife, its regulating part can drive the motion of second support through first support to adjust the position relation between first backing roll, second backing roll and the cutting member, no matter the diameter of pipe is great or less, can realize firm three point location through first backing roll, second backing roll and cutting member three, be convenient for follow-up staff to cut the pipe; furthermore, because the utility model discloses the position of well second backing roll can change along with the change of cutting member position, and the cooperation of the two has improved cutting efficiency.

Description

Pipe cutter

RELATED APPLICATIONS

The present application claims priority from chinese patent application No. 202020985851.7 entitled "tube cutter" filed on 2.6.2020, which is incorporated herein by reference in its entirety.

Technical Field

The utility model relates to a hand tool technical field relates to a cutting tool, especially relates to a pipe cutting knife.

Background

The traditional pipe cutter comprises two rollers fixedly arranged and a movable auxiliary blade, the pipe is positioned at three points through the two rollers and the auxiliary blade, and then the pipe is cut through moving the auxiliary blade. However, because the distance between the two rollers is not adjustable, when the diameter of the pipe is too large or too small, the pipe cannot be stably positioned and cut by the two rollers and the auxiliary blade, so that the traditional pipe cutter cannot cut pipes with various diameters, and the application range is small.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need for an improved pipe cutter that can securely position and cut pipes of different diameters.

The utility model provides a pipe cutting knife, include:

a housing;

a first bracket movably connected to the housing;

a second bracket connected to the first bracket;

a first support roller mounted to the housing;

the second supporting roller is arranged on the second bracket;

a cutting member mounted to the first bracket;

an adjusting member connected to the first bracket;

the adjusting piece drives the second support to move through the first support, and therefore the position relation among the first support roller, the second support roller and the cutting piece is adjusted.

In an embodiment of the present invention, the first bracket is rotatably connected to the housing, the second bracket is rotatably connected to the first bracket, and the first bracket rotates relative to the housing under the driving of the adjusting member and drives the second bracket to move.

In an embodiment of the present invention, a sliding track is disposed on one side of the casing relatively close to the opening, the second support roller includes a second wheel body and a second rotating shaft protruding from the second wheel body, the second rotating shaft is fixedly disposed on the second support, and the second rotating shaft can slide along the sliding track under the driving of the first support.

In an embodiment of the present invention, the side wall of the housing is provided with an arc-shaped groove to form the sliding rail; alternatively, the first and second electrodes may be,

an arc-shaped notch is formed in the side wall of the shell and forms the sliding track.

In an embodiment of the present invention, the shape of the sliding track is such that the second supporting roller always forms an isosceles triangle between the contact point of the first supporting roller and the pipe, the contact point of the second supporting roller and the pipe, and the contact point of the cutting member and the pipe during the movement of the second supporting roller; the contact point of the cutting piece and the pipe is a cutting point, and the maximum deviation angle between the connecting line between the axis of the cutting piece and the cutting point and the central line of the isosceles triangle is +/-15 degrees.

In an embodiment of the present invention, the axis of the cutting member and the connecting line between the cutting points coincide with the central line of the isosceles triangle.

In an embodiment of the present invention, the pipe cutter further includes a first limiting member and a second limiting member both sleeved on the adjusting member, a first limiting hole matching with the first limiting member is disposed in the housing, a second limiting hole matching with the second limiting member is disposed in the first bracket, and the adjusting member is connected to the housing and the first bracket through the first limiting member and the second limiting member, respectively;

the first limiting piece is in threaded connection with the adjusting piece; and/or the presence of a catalyst in the reaction mixture,

the second limiting part is in threaded connection with the adjusting part.

In one embodiment of the present invention, the pipe cutter further comprises a limiting element, the limiting element being mounted at an end of the adjusting member relatively close to the cutting member; and/or the presence of a catalyst in the reaction mixture,

the pipe cutting knife further comprises a knob, and the knob is sleeved and fixedly connected to one end, far away from the cutting piece relatively, of the adjusting piece.

In an embodiment of the present invention, the housing includes a first housing and a second housing fastened and fixed to each other; and/or the presence of a catalyst in the reaction mixture,

the first support comprises a first support body and a second support body which are mutually buckled; and/or the presence of a catalyst in the reaction mixture,

the second support and the second supporting roll are integrated into an arc-shaped roller support.

In an embodiment of the present invention, the pipe cutter further includes an auxiliary blade assembly, and the housing is provided with an accommodating groove for accommodating the auxiliary blade assembly; the auxiliary blade assembly comprises an auxiliary blade and a knife sleeve which is sleeved on and rotatably connected with the auxiliary blade, the knife sleeve can slide in the accommodating groove, and the auxiliary blade assembly is enabled to have an extending state that the auxiliary blade extends out of the accommodating groove and a retracting state that the auxiliary blade is accommodated in the accommodating groove.

The utility model provides a pipe cutting knife, the adjusting part of which can drive the second bracket to move through the first bracket, thereby adjusting the position relation between the first supporting roller, the second supporting roller and the cutting part, and realizing stable three-point positioning through the first supporting roller, the second supporting roller and the cutting part no matter the diameter of the pipe is larger or smaller, thereby facilitating the subsequent staff to cut the pipe; furthermore, because the utility model discloses the position of well second backing roll can change along with the change of cutting member position, and the cooperation of the two has improved cutting efficiency.

Drawings

Fig. 1 is a schematic structural view of a pipe cutter according to a first embodiment of the present invention;

FIG. 2 is a cross-sectional view of the pipe cutter of FIG. 1;

FIG. 3 is an exploded view of the tube cutter of FIG. 1;

FIG. 4 is a partial structural view of the pipe cutter of FIG. 1;

fig. 5 is a schematic structural view of a pipe cutter according to a second embodiment of the present invention;

FIG. 6 is an exploded view of the first holder of the pipe cutter of FIG. 5;

fig. 7 is a schematic structural view of a pipe cutter according to a third embodiment of the present invention;

FIG. 8 is a cross-sectional view of the pipe cutter of FIG. 7;

FIG. 9 is an exploded view of the configuration of the tube cutter portion of FIG. 7;

fig. 10 is a schematic structural view of a part of the structure in the pipe cutter according to the fourth embodiment of the present invention;

fig. 11 is a schematic view showing the structure of the first housing in the pipe cutter of fig. 10.

100. A pipe cutter; 10. a housing; 11. an opening; 12. a first housing; 13. a second housing; 121. a first latch; 122. a first shaft groove; 131. a first slot; 14. a third rotation shaft groove; 15. a sliding track; 151. an arc-shaped groove; 152. an arc-shaped notch; 16. a first limit hole; 17. a first fixing groove; 18. a containing groove; 20. a first bracket; 21. a first frame body; 22. a second frame body; 211. a second bolt; 221. a second slot; 23. a blade shaft slot; 24. a third rotating shaft; 25. a third spindle hole; 26. a fourth rotation shaft groove; 27. a second limiting hole; 28. a second fixing groove; 30. a second bracket; 31. a second rotary shaft groove; 32. a fourth rotating shaft; 33. a fourth rotating shaft hole; 40. a first support roller; 41. a first wheel body; 42. a first rotating shaft; 50. a second support roller; 51. a second wheel body; 52. a second rotating shaft; 60. cutting the piece; 61. a disc blade; 62. a blade shaft; 63. cutting points; 70. an adjustment member; 71. a limiting section; 72. an adjustment section; 73. a spacing element; 74. a knob; 81. a first limit piece; 811. a first stopper; 8111. a first mating hole; 812. a first fixed shaft; 82. a second limiting member; 821. a second limiting block; 822. a second fixed shaft; 90. an auxiliary blade assembly; 91. an auxiliary blade; 92. a knife sheath; 93. a spring plate; 921. positioning a groove; 94. a push button; 200. a tube.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

The utility model provides a pipe cutting knife 100, it is used for cutting pipe 200. In the present embodiment, the pipe cutter 100 is used to cut a copper pipe. It is understood that in other embodiments, the pipe cutter 100 may also be applied to cut other pipe bodies such as PVC pipes, steel pipes, aluminum pipes, etc., and may also be applied to cut other tubular or cylindrical objects.

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a pipe cutter 100 according to a first embodiment of the present invention; fig. 2 is a sectional view of the pipe cutter 100 shown in fig. 1; fig. 3 is an exploded view of the pipe cutter 100 shown in fig. 1.

The traditional pipe cutter comprises two rollers fixedly arranged on a shell and a movable auxiliary blade, the pipe is positioned at three points through the two rollers and the auxiliary blade, and then the pipe is cut through the movable auxiliary blade. However, because the distance between the two rollers is not adjustable, when the diameter of the pipe is too large or too small, the pipe cannot be stably positioned and cut by the two rollers and the auxiliary blade, so that the traditional pipe cutter cannot cut pipes with various diameters, and the application range is small.

In view of the above problems, the present invention provides a pipe cutter 100, in a first embodiment, the pipe cutter 100 includes a housing 10, a first support 20, a second support 30, a first support roller 40, a second support roller 50, a cutting member 60, and an adjusting member 70, wherein the first support 20 is movably connected to the housing 10; the second bracket 30 is connected to the first bracket 20; the first supporting roller 40 is mounted to the housing 10; the second support roller 50 is mounted to the second bracket 30; the cutter 60 is mounted to the first bracket 20; the adjusting member 70 is connected to the first bracket 20; the adjusting member 70 moves the second bracket 30 by the first bracket 20, thereby adjusting the positional relationship between the first and second support rollers 40 and 50 and the cutting member 60.

For traditional pipe cutting knife 100, the utility model provides a pipe cutting knife 100, its regulating part 70 can drive the motion of second support 30 through first support 20 to adjust the position relation between first backing roll 40, second backing roll 50 and the cutting member 60, no matter the diameter of pipe 200 is great or less, can both realize firm three point location through first backing roll 40, second backing roll 50 and cutting member 60 three, the follow-up staff of being convenient for cuts pipe 200. In addition, two rollers of the traditional pipe cutter are fixedly arranged on the shell, the position of the cutting piece can be adjusted only through the adjusting piece, only one point in three-point positioning can move, and the cutting efficiency is low; and the utility model discloses well second backing roll 50's position can change along with the change of cutting member 60 position for two points in the three point location can cooperate the removal, thereby improved cutting efficiency.

The utility model discloses well seed cutting knife 100's use does: the worker adjusts the adjusting piece 70 according to the diameter of the pipe 200, the adjusting piece 70 drives the first support 20 to move, the first support 20 drives the second support 30 and the cutting piece 60 to move, the second support 30 drives the second support roller 50 to move relative to the shell, and therefore the position relation among the first support roller 40, the second support roller 50 and the cutting piece 60 is adjusted, and stable three-point positioning of the pipe 200 is achieved; at this point, the operator rotates the pipe 200 while continuing to apply some force to the adjustment member 70, and the cutting member 60 will cause a cut in the pipe 200, thereby slowly severing the pipe 200.

Specifically, an opening 11 is formed at one side of the housing 10, and the opening 11 is used for the pipe 200 to be put into the housing 10 along the radial direction thereof. Compared with the existing pipe cutter 100 sleeved on the pipe 200, the pipe cutter 100 provided by the application is not affected by the length of the pipe 200, is more flexible and has wide application scenes. It will be appreciated that in other embodiments, an opening 11 may be provided in the middle of the housing 10, and the tube 200 may extend into the opening 11 along the axial direction thereof.

More specifically, the housing 10 is substantially arc-shaped, and the exterior of the housing 10 is relatively round and smooth, and has no sharp structure protruding outwards, so that the housing is convenient for a worker to hold and apply force; the casing 10 is provided with a structure for directly or indirectly mounting the first support 20, the second support 30, the first support roller 40, the second support roller 50, the cutting member 60 and the adjusting member 70, so that the integration of the whole pipe cutter 100 is improved, the pipe cutter 100 is miniaturized, and the pipe cutter is convenient for workers to carry and carry; the housing 10 may be made of plastic or metal, which is convenient for manufacturing and has low cost.

In an embodiment of the present invention, in order to facilitate the processing and the installation of the internal structure, the housing 10 includes a first housing 12 and a second housing 13 that are fastened and fixed to each other, a first pin 121 is disposed on one of the first housing 12 and the second housing 13, a first slot 131 is disposed on the other one of the first housing 12 and the second housing 13, and the first housing 12 and the second housing 13 are fastened and fixed to each other through the cooperation of the first pin 121 and the first slot 131. It is understood that in other embodiments, the first housing 12 and the second housing 13 may be connected to each other by threaded fasteners, welding, gluing, or other common means.

Preferably, the number of the first pins 121 and the number of the first slots 131 are at least two, so as to increase the connection stability between the first casing 12 and the second casing 13. Specifically, at least one set of the first plug 121 and the first slot 131 is located at an end or edge of the housing 10 to prevent the housing 10 from being scattered during service.

The first bracket 20 is movably connected to the housing 10, and the first bracket 20 is connected to the adjusting member 70 and serves to carry the cutting member 60. The first bracket 20 is provided with a through hole (not numbered) for the adjusting member 70 to extend into, and the first bracket 20 is driven by the adjusting member 70 to move relative to the housing 10, so as to adjust the relative position relationship between the cutting member 60 and the pipe 200.

In one embodiment, in order to facilitate the processing and forming and simplify the connection steps of the cutting element 60, the adjusting element 70 and the first frame 20, the first frame 20 includes a first frame 21 and a second frame 22 that are fastened to each other, one of the first frame 21 and the second frame 22 is provided with a second pin 211, the other is provided with a second slot 221, and the first frame 21 and the second frame 22 are fastened to each other through the matching of the second pin 211 and the second slot 221. It is understood that in other embodiments, the first frame 21 and the second frame 22 may be connected to each other by a threaded fastener, welding, gluing, or other common methods.

Preferably, the number of the second pins 211 and the second slots 221 is at least two, so as to increase the connection stability between the first frame 21 and the second frame 22. Specifically, at least one set of the second latch 211 and the second slot 221 is located at an end or edge of the first rack 20 to prevent the first rack 20 from being scattered during service.

Further, the first bracket 20 is made of plastic, which is convenient for processing and forming. It is understood that in other embodiments, the first bracket 20 may be made of other common materials such as metal, ceramic, etc.

The second bracket 30 is movably coupled to the housing 10, and the second bracket 30 is coupled to the first bracket 20 and is used to carry the second supporting roller 50. The second support 30 can move relative to the housing 10 under the driving of the first support 20, so as to drive the second support roller 50 to move, change the position relationship among the first support roller 40, the second support roller 50 and the cutting member 60, and realize three-point fixing of the pipe 200, so that the pipe cutter 100 can conveniently cut pipes 200 of different diameters. On the other hand, since the second bracket 30 is linked with the first bracket 20, the worker can adjust the positions of the cutting member 60 and the second supporting roller 50 at the same time only by adjusting the first bracket 20 through the adjusting member 70, and the cutting member 60 and the second supporting roller 50 can be moved to be matched with each other, so that pipes 200 with different diameters can be fixed more quickly, and the positioning speed and the cutting efficiency of the pipes 200 are greatly improved.

Preferably, the second bracket 30 is an integrated arc-shaped roller bracket with the second supporting roller 50. The second support 30 and the second support roller 50 are integrated to form a roller support, so that the integration of the pipe cutter 100 can be improved, the assembly process of the pipe cutter 100 is simplified, the precision is high, and the stress is stable. The second bracket 30 has a substantially arc shape, and not only can be well fitted to the housing 10, but also can better fix the cylindrical pipe 200 by having an arc-shaped moving path when moving along with the first bracket 20. It is understood that the second frame 30 may also be a structure similar to the first frame 20, and is formed by splicing two frame bodies, which can be selected according to actual needs.

The first supporting roller 40 is mounted to the housing 10. Specifically, the first supporting roller 40 includes a first wheel 41 and a first rotating shaft 42, and the first wheel 41 is sleeved on the first rotating shaft 42 and can rotate relative to the first rotating shaft 42; the first casing 12 and the second casing 13 are both provided with a first rotating shaft groove 122 for fixing the first rotating shaft 42; both ends of the first rotating shaft 42 are fixed in the first rotating shaft grooves 122 of the first casing 12 and the second casing 13, respectively, thereby realizing the mounting of the first supporting roller 40 with respect to the casing 10.

The second support roller 50 is mounted to the second bracket 30. Specifically, the second support roller 50 includes a second roller body 51 and a second rotating shaft 52, and the second roller body 51 is sleeved on the second rotating shaft 52 and can rotate relative to the second rotating shaft 52; the second bracket 30 is provided with a second rotating shaft groove 31 for fixing the second rotating shaft 52, and the second rotating shaft 52 is fixedly installed on the second bracket 30 through the second rotating shaft groove 31.

The cutter 60 is mounted to the first bracket 20. Specifically, the cutting element 60 includes a disc blade 61 and a blade shaft 62, the disc blade 61 is fitted on the blade shaft 62, the disc blade 61 is rotatable with respect to the blade shaft 62, a blade shaft groove 23 for fixing the blade shaft 62 is formed in the first support 20, and the blade shaft 62 is fixedly mounted to the first support 20 through the blade shaft groove 23.

Preferably, the cutting member 60 is fixedly mounted to the end of the first carriage 20 to allow a wide range of movement. It is understood that, in other embodiments, the cutting member 60 may be disposed at the middle portion of the first frame 20 regardless of the moving range of the cutting member 60.

The adjusting member 70 is movably coupled to the housing 10 and to the first bracket 20. Specifically, the outer wall of the adjusting member 70 is provided with an external thread, and the relative positional relationship between the adjusting member 70 and the housing 10 is changed by the thread. It will be appreciated that the threaded engagement with the adjustment member 70 may be provided directly with internal threads within the housing 10, or by providing an intermediate component and providing threads within the intermediate component to provide a threaded connection with the adjustment member 70.

Preferably, the adjusting member 70 has a rod shape, and one end of the adjusting member 70 is connected to the first bracket 20, thereby increasing the moving stroke of the first bracket 20 with respect to the housing 10.

Referring to fig. 1 to 3 again, in an embodiment of the present invention, the first bracket 20 is rotatably connected to the housing 10, the second bracket 30 is rotatably connected to the first bracket 20, and the adjusting member 70 moves relative to the housing 10 to drive the first bracket 20 to rotate, so as to drive the second bracket 30 to rotate, thereby adjusting the positions of the first supporting roller 40, the second supporting roller 50 and the cutting member 60.

With the arrangement, on one hand, the linkage of the adjusting part 70, the first support 20 and the second support 30 is realized through the rotary connection, the overall structure of the pipe cutter 100 is compact, and the pipe cutter 100 is convenient to develop towards miniaturization; on the other hand, since the pipe 200 is generally cylindrical, the first support roller 40, the second support roller 50 and the cutting member 60 can be better fitted to the cylindrical pipe 200 due to the rotary connection structure between the adjusting member 70, the first bracket 20 and the second bracket 30, the fixing effect is better, and the cutting of the pipe 200 is more stable.

It will be appreciated that, regardless of the compactness of the pipe cutter 100, the first support 20 may be moved in the housing 10 by other means such as translation, and corresponding slide slots may be provided in the housing 10 to define the moving path of the first support 20, so long as the second support 30 can move with the first support 20 and allow the first support roller 40, the second support roller 50 and the cutter 60 to fix pipes 200 of various diameters.

Specifically, the pipe cutter 100 further includes a third rotating shaft 24 and a fourth rotating shaft 32, the first bracket 20 is provided with a third rotating shaft hole 25 through which the third rotating shaft 24 passes, the housing 10 is provided with a third rotating shaft groove 14 through which the third rotating shaft 24 is fixed, and the third rotating shaft 24 passes through the third rotating shaft hole 25 and is fixed to the housing 10 in cooperation with the third rotating shaft groove 14; and/or, the second bracket 30 is provided with a fourth rotating shaft hole 33 for the fourth rotating shaft 32 to penetrate, the first bracket 20 is provided with a fourth rotating shaft groove 26 for the third rotating shaft 24 to be fixed, and the fourth rotating shaft 32 penetrates the fourth rotating shaft hole 33 and is fixedly arranged on the first bracket 20 in a matching manner with the fourth rotating shaft groove 26.

It can be understood that when the first housing 12 and the second housing 13 are fastened to form the housing 10, the third rotating shaft groove 14 is formed on each of the first housing 12 and the second housing 13, so as to facilitate the installation and fixation of the third rotating shaft 24; when the first frame body 21 and the second frame body 22 are fastened to form the first frame body 20, the first frame body 20 and the second frame body 30 are both provided with the third rotating shaft hole 25 and the fourth rotating shaft groove 26, which is convenient for the installation and fixation of the third rotating shaft 24 and the fourth rotating shaft 32. The third rotation shaft groove 14 and the fourth rotation shaft groove 26 are not limited to grooves, and may be through holes as long as they function to fix the third rotation shaft 24 and the fourth rotation shaft 32.

In an embodiment of the present invention, a side of the housing 10 relatively close to the opening 11 is provided with a sliding rail 15, and the second rotating shaft 52 can slide along the sliding rail 15 under the driving of the first bracket 20.

With this arrangement, the movement locus of the second supporting roller 50 relative to the housing 10 is relatively fixed, and the stability of the pipe cutter 100 in use can be improved, so as to improve the cutting efficiency.

In one embodiment, the side wall of the housing 10 is provided with an arc-shaped groove 151 to form the sliding track 15. Specifically, arc-shaped grooves 151 are formed in the first housing 12 and the second housing 13, and the second rotating shaft 52 extends into the arc-shaped grooves 151 and can slide along the inner walls of the arc-shaped grooves 151 under the driving of the second bracket 30. With such an arrangement, the second rotating shaft 52 is not easily removed from the groove, and the second rotating shaft 52 is not exposed on the surface of the housing 10, so that the service life of the second rotating shaft 52 is prolonged.

It is understood that the arc-shaped groove 151 is only one preferred groove shape in the present embodiment, and in other embodiments, other structures for fixing the second rotating shaft 52, such as a long-strip-shaped groove, a kidney-shaped groove, an arc-shaped through hole, a long-strip-shaped through hole, etc., may be selected as long as the second rotating shaft 52 can slide therein.

Referring to fig. 1 to 3 together with fig. 4, fig. 4 is a partial structural view of the pipe cutter 100 shown in fig. 1.

In an embodiment of the present invention, the pipe cutter 100 further includes a first limiting member 81 and a second limiting member 82 both sleeved on the adjusting member 70, a first limiting hole 16 matching with the first limiting member 81 is formed in the housing 10, a second limiting hole 27 matching with the second limiting member 82 is formed in the first bracket 20, and the adjusting member 70 is connected to the housing 10 and the first bracket 20 through the first limiting member 81 and the second limiting member 82, respectively; the first limiting member 81 is in threaded connection with the adjusting member 70; and/or, the second limiting member 82 is in threaded connection with the adjusting member 70.

Thus, the adjusting member 70 can drive the first bracket 20 to move relative to the housing 10 by moving relative to the first limiting member 81 and/or the second limiting member 82.

Specifically, in one embodiment, internal threads are disposed in both the first limiting member 81 and the second limiting member 82, and the adjusting rod is simultaneously in threaded engagement with the first limiting member 81 and the second limiting member 82; at this time, the adjusting rod has a sufficient length to be respectively matched with the first limiting member 81 and the second limiting member 82, so that the first limiting member 81/the second limiting member 82 can move. So set up, can improve the stability of adjusting the pole when the motion to drive first support 20 and carry out stable rotation.

In another embodiment, a first matching hole 8111 is formed in the first limiting member 81, the first matching hole 8111 has an internal thread, a second matching hole (not numbered) is formed in the second limiting member 82, and the adjusting rod is in threaded fit with the first matching hole 8111 and penetrates through the second matching hole; the diameter of second mating holes is greater than the diameter of wearing to establish the regulation pole of second mating holes department for adjust the pole and can have certain angle control scope in the second mating holes. Through the rotation adjusting rod, the connection relation between the adjusting rod and the first limiting part 81 can be changed, and at the moment, the adjusting rod can have a small-range angle change in the second limiting part 82 and abut against the inner wall of the second matching hole, so that the outer wall of the second limiting part 82 abuts against the inner wall of the second limiting hole 27 to drive the first support 20 to rotate. It is understood that, in other embodiments, the first limiting member 81 can also be interchanged with the second limiting member 82, an internal thread is disposed in the second limiting member 82, and a second mating hole is disposed in the first limiting member 81; the basic motion principle is basically unchanged, and is not described herein.

Furthermore, in one embodiment, the first limiting member 81 includes a first limiting block 811 and a first fixing shaft 812, and a first fixing groove 17 for fixing the first fixing shaft 812 is correspondingly formed in the first casing 12 and the second casing 13; and/or the second limiting member 82 includes a second limiting member 821 and a second fixing shaft 822, and a second fixing groove 28 for fixing the second fixing shaft 822 is correspondingly formed in the first frame body 21 and the second frame body 22. It is understood that the first fixing groove 17 and the second fixing groove 28 can protect the first fixing shaft 812 and the second fixing shaft 822 from being exposed, and if the protection of the first fixing shaft 812 and the second fixing shaft 822 is not considered, the first fixing groove 17 or the second fixing groove 28 may be replaced with a first fixing hole or a second fixing hole, respectively.

In an embodiment of the present invention, the adjusting member 70 includes a limiting section 71 and an adjusting section 72 that are connected to each other and have different diameters, a step surface (not labeled) is formed between the limiting section 71 and the adjusting section 72, the first limiting member 81 is sleeved on the limiting section 71, and the second limiting member 82 is sleeved on the adjusting section 72 and can move on the adjusting section 72. With such an arrangement, the first limiting member 81 and/or the second limiting member 82 can be limited by the step surface between the limiting section 71 and the adjusting section 72, and there is no need to additionally provide another limiting element 73 between the first limiting member 81 and the second limiting member 82, so that the overall structure of the pipe cutter 100 is more compact; in addition, the step section can also play a role in assisting the installation and positioning of the second limiting member 82.

Preferably, the diameter of the limiting section 71 is larger than that of the adjusting section 72, so that the end near the cutting member 60 has a smaller diameter, and the disc blade 61 and the pipe 200 can be set aside to cut the pipe 200 with a larger diameter. It is understood that in other embodiments, the diameter of the position-limiting segment 71 may be smaller than the diameter of the adjusting segment 72, so long as a step surface is formed therebetween.

It can be understood that the limiting section 71 and the adjusting section 72 can be directly connected with each other to form a step surface, and can also include other components such as a central connecting rod, as long as the step surface can be formed, and the limiting section has a certain limiting function and an installation assisting function.

In one embodiment, the pipe cutter 100 further comprises a stopper element 73, and the stopper element 73 is mounted to an end of the adjusting member 70 relatively close to the cutting member 60. With such an arrangement, on the one hand, the second limiting member 82 can be prevented from falling off from the adjusting member 70, and on the other hand, the second limiting member 82 can be prevented from damaging the cutting member 60 when moving to a position close to the end of the cutting member 60.

In one embodiment, the pipe cutter 100 further includes a knob 74, the knob 74 being disposed around and fixedly attached to an end of the adjustment member 70 opposite the cutting member 60 to facilitate the application of torque to the adjustment member 70 by the operator.

The utility model discloses the second embodiment is still provided. Referring to fig. 5 to 6, fig. 5 is a schematic structural diagram of a pipe cutter 100 according to a second embodiment of the present invention; fig. 6 is an exploded view of the first support 20 in the pipe cutter 100 shown in fig. 5.

The second embodiment is substantially the same as the first embodiment except that in the second embodiment, the side wall of the housing 10 is formed with an arc-shaped recess 152 and forms the slide rail 15. Specifically, the first housing 12 and the second housing 13 are both provided with an arc-shaped recess 152, and the second rotating shaft 52 can slide along the peripheral wall of the arc-shaped recess 152 under the driving of the second bracket 30. With this arrangement, the mounting process of the second supporting roller 50 is simplified.

It is understood that the arc-shaped notch 152 is only one preferred shape in the present embodiment, and in other embodiments, notches having other shapes such as a rectangular notch, a V-shaped notch, etc. may be selected as long as the second rotating shaft 52 can slide on the peripheral wall thereof.

The utility model discloses the third embodiment is still provided. Referring to fig. 7 to 9, fig. 7 is a schematic structural view of a pipe cutter 100 according to a third embodiment of the present invention; fig. 8 is a sectional view of the pipe cutter 100 shown in fig. 7; fig. 9 is an exploded view of a portion of the tube cutter 100 shown in fig. 7.

The third embodiment has substantially the same structure as the first and second embodiments, and differs therefrom only in that in the third embodiment, the pipe cutter 100 further includes an auxiliary blade assembly 90, and the housing 10 is provided with a receiving groove 18 for receiving the auxiliary blade assembly 90; the auxiliary blade assembly 90 includes an auxiliary blade 91 and a knife sleeve 92 sleeved and rotatably connected to the auxiliary blade 91, wherein the knife sleeve 92 can slide in the accommodating groove 18, and the auxiliary blade assembly 90 has an extended state in which the auxiliary blade 91 extends out of the accommodating groove 18 and a retracted state in which the auxiliary blade 91 is accommodated in the accommodating groove 18. So set up, after cutting piece 60 in pipe cutting knife 100 cuts pipe 200, the staff can utilize supplementary blade assembly 90 to reject the burr on pipe 200, and supplementary blade 91 among the supplementary blade assembly 90 rotates and connects in the broach shell 92, makes the use of supplementary blade 91 more nimble.

Further, in an embodiment of the present invention, the auxiliary blade assembly 90 further includes an elastic sheet 93, the elastic sheet 93 is fixedly disposed in the accommodating groove 18, two positioning grooves 921 are disposed on the outer peripheral wall of the knife sheath 92, and the auxiliary blade assembly 90 realizes the extending state and the positioning of the withdrawing state by the abutting of the elastic sheet 93 and the positioning grooves 921. The knife sheath 92 has a stable extending state and a retracting state through the matching of the positioning groove 921 and the elastic sheet 93, and is convenient to use.

Further, the auxiliary blade assembly 90 further comprises a push button 94 fixedly connected to the knife sleeve 92 and extending out of the housing 10, and the push button 94 is provided with anti-skid lines, so that the convenience of the auxiliary blade assembly 90 in use is further improved.

Further, the auxiliary blade 91 is an arc-shaped blade, and can be better accommodated in the housing 10, so that the overall size of the pipe cutter 100 is reduced, and burrs on the cylindrical pipe 200 can be better removed.

Further, the end of the auxiliary blade 91 far away from the knife sleeve 92 is non-sharp, so that the end of the auxiliary blade 91 is prevented from damaging workers or the pipe 200.

The utility model discloses the fourth embodiment is still provided. Referring to fig. 10 and 11, fig. 10 is a schematic structural view of a part of a pipe cutter according to a fourth embodiment of the present invention; fig. 11 is a schematic view showing the structure of the first housing in the pipe cutter of fig. 10.

The fourth embodiment has substantially the same structure as the first, second and third embodiments, except that in the fourth embodiment, the shape of the slide rail 15 is such that the contact point of the first support roller 40 with the pipe 200, the contact point of the second support roller 50 with the pipe 200 and the contact point of the cutter 60 with the pipe 200 are always isosceles triangles between the second support roller 50 and the pipe 200 during the movement; the contact point of the cutting member 60 with the pipe 200 is a cutting point 63, and the maximum deviation angle between the line connecting the axis of the cutting member 60 and the cutting point 63 with respect to the center line of the isosceles triangle is ± 15 °.

In this embodiment, since the contact point between the first support roller 40 and the pipe 200, the contact point between the second support roller 50 and the pipe 200, and the contact point between the cutting member 60 and the pipe 200 are always isosceles triangles, three points of the pipe 200 are balanced in stress, and the fixing effect on the pipe 200 is good; moreover, the isosceles triangle is convenient for stress analysis, and the design process of designers can be simplified, so that the shape of the pipe cutter 100 can be made into different shapes according to actual requirements. In addition, in the embodiment, the maximum deviation angle between the connecting line between the axis of the cutting element 60 and the cutting point 63 and the central line of the isosceles triangle is ± 15 °, so that the stress of the pipe 200 is basically balanced at three points in the process of cutting the pipe 200 by the pipe cutter 100, the pipe cutter 200 is not easy to be separated from the opening 11, and the use efficiency of the pipe cutter 100 is improved.

Specifically, in the present embodiment, the first supporting roller 40 and the second supporting roller 50 are both cylindrical, and the cutting member 60 is disc-shaped, so as to facilitate the positioning of the contact points between the first supporting roller 40, the second supporting roller 50 and the cutting member 60 and the pipe 200, respectively, and facilitate the stress analysis of the pipe cutter 100 during the use process, so as to ensure that the pipe 200 is approximately in a stress balance state after entering the opening 11 and during the cutting process, and prevent the pipe 200 from coming out of the opening 11.

It is understood that in other embodiments, the first support roller 40 and the second support roller 50 may be in other shapes, such as eccentric cylinders, and such irregular shapes, although the stress analysis is more complicated, can still achieve the stress balance of the tube 200 in the tube cutter 100, and also achieve the purpose of preventing the tube 200 from falling out of the opening.

Further, the stress analysis and simulation can be performed using the most common tube 200 having a diameter of 3mm to 30 mm. The designer can design the pipe cutter 100 using the following ideas: designing the general shape of the shell 10 according to actual requirements, determining the position of the first supporting roller 40 and the moving path of the adjusting member 70; since the movement path of the adjusting member 70 is known, the movement path of the cutting member 60 can be determined, so that the contact points between the pipes 200 of different diameters and the first supporting roller 40 and the cutting member 60 can be determined; since the axis of the cutting member 60 is known and the cutting point 63 of the cutting member 60 and the pipe 200 is known, the line between the axis of the cutting member 60 and the cutting point 63 can be determined; the line connecting the cutting member 60 and the cutting point 63 is used as a median line (there may be a certain deviation, the deviation range is ± 15 °), and the position and the movement path of the second supporting roller 50 are simulated and obtained, so that the contact point of the first supporting roller 40 and the pipe 200, the contact point of the second supporting roller 50 and the pipe 200, and the contact point of the cutting member 60 and the pipe 200 always form an isosceles triangle.

Referring to fig. 11 again, in the present embodiment, according to the shape of the housing 10 and the movement path of the adjusting member 70, the shape of the simulated rear sliding rail 15 is the shape shown in fig. 11, and is substantially "7". It is understood that in other embodiments, different shapes of the sliding rail 15 can be simulated according to different shapes of the housing 10 and different moving paths of the adjusting member 70, which are not listed here.

Preferably, a line connecting the axis of the cutter 60 and the cutting point 63 coincides with the center line of the isosceles triangle. So arranged, the pipe cutter 100 can better ensure that the pipe 200 can not be pulled out from the opening 11 in the cutting process.

The utility model provides a pipe cutting knife 100, its adjusting part 70 can drive the motion of second support 30 through first support 20 to adjust the position relation between first backing roll 40, second backing roll 50 and cutting member 60, no matter the diameter of pipe 200 is great or less, can realize firm three point location through first backing roll 40, second backing roll 50 and cutting member 60 three, be convenient for follow-up staff to cut pipe 200; in addition, because the position of the second supporting roller 50 can be changed along with the change of the position of the cutting member 60, the cutting efficiency is improved by the cooperation of the two.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and 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 interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be taken as limiting the present invention, and that suitable modifications and variations of the above embodiments are within the scope of the invention as claimed.

Claims (10)

1. A pipe cutter, comprising:

a housing (10);

a first bracket (20) movably connected to the housing (10);

the second bracket (30) is connected to the first bracket (20), and the movement of the first bracket can drive the second bracket to move;

a first support roller (40) attached to the housing (10);

a second support roller (50) mounted to the second bracket (30);

a cutter (60) mounted to the first bracket (20);

an adjusting member (70) connected to the first bracket (20);

the adjusting piece (70) adjusts the first bracket (20) to move and drives the second bracket (30) to move through the first bracket, so that the position relation among the first supporting roller (40), the second supporting roller (50) and the cutting piece (60) is adjusted.

2. Pipe cutter according to claim 1, characterized in that the first holder (20) is rotatably connected to the housing (10), the second holder (30) is rotatably connected to the first holder (20), and the first holder (20) is rotated relative to the housing (10) by the drive of the adjusting element (70) and the second holder (30) is moved.

3. The pipe cutting knife according to claim 2, characterized in that the housing (10) is provided with an opening (11) into which the pipe (200) extends, a sliding track (15) is provided on a side of the housing (10) relatively close to the opening (11), the second support roller (50) comprises a second wheel body (51) and a second rotating shaft (52) protruding from the second wheel body (51), the second rotating shaft (52) is fixedly arranged on the second support frame (30), and the second rotating shaft (52) can slide along the sliding track (15) under the driving of the first support frame (20).

4. The pipe cutter according to claim 3, characterized in that the side wall of the housing (10) is provided with an arc-shaped groove (151) and forms the sliding track (15); alternatively, the first and second electrodes may be,

an arc-shaped notch (152) is formed in the side wall of the shell (10) and forms the sliding track (15).

5. Pipe cutter according to claim 3, characterized in that the sliding track (15) is shaped so that the second support roller (50) always has an isosceles triangle shape between the contact point of the first support roller (40) with the pipe (200), the contact point of the second support roller (50) with the pipe (200) and the contact point of the cutting element (60) with the pipe (200) during movement; the contact point of the cutting member (60) and the pipe (200) is a cutting point (63), and the maximum deviation angle between the connecting line between the axis of the cutting member (60) and the cutting point (63) relative to the central line of the isosceles triangle is +/-15 degrees.

6. Pipe cutter according to claim 5, characterised in that the line between the axis of the cutting element (60) and the cutting point (63) coincides with the middle line of the isosceles triangle.

7. The pipe cutting knife according to claim 1, characterized in that the pipe cutting knife (100) further comprises a first limiting member (81) and a second limiting member (82) both sleeved on the adjusting member (70), a first limiting hole (16) matched with the first limiting member (81) is formed in the housing (10), a second limiting hole (27) matched with the second limiting member (82) is formed in the first bracket (20), and the adjusting member (70) is connected to the housing (10) and the first bracket (20) through the first limiting member (81) and the second limiting member (82), respectively;

the first limiting piece (81) is in threaded connection with the adjusting piece (70); and/or the presence of a catalyst in the reaction mixture,

the second limiting piece (82) is in threaded connection with the adjusting piece (70).

8. Pipe cutter according to claim 5, characterized in that the pipe cutter (100) further comprises a stop element (73), the stop element (73) being mounted at an end of the adjusting member (70) relatively close to the cutting member (60); and/or the presence of a catalyst in the reaction mixture,

the pipe cutter (100) further comprises a knob (74), and the knob (74) is sleeved and fixedly connected with one end, far away from the cutting part (60), of the adjusting part (70).

9. The pipe cutter according to claim 5, characterized in that the housing (10) comprises a first housing (12) and a second housing (13) which are fastened to each other; and/or the presence of a catalyst in the reaction mixture,

the first support (20) comprises a first support body (21) and a second support body (22) which are mutually buckled; and/or the presence of a catalyst in the reaction mixture,

the second support (30) and the second support roller (50) are integrated into an arc roller support.

10. The pipe cutter according to claim 1, characterized in that the pipe cutter (100) further comprises an auxiliary blade assembly (90), and the housing (10) is provided with a containing groove (18) for containing the auxiliary blade assembly (90); the auxiliary blade assembly (90) comprises an auxiliary blade (91) and a knife sleeve (92) sleeved and rotatably connected with the auxiliary blade (91), wherein the knife sleeve (92) can slide in the accommodating groove (18), and the auxiliary blade assembly (90) has an extending state that the auxiliary blade (91) extends out of the accommodating groove (18) and a retracting state that the auxiliary blade (91) is accommodated in the accommodating groove (18).

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