CN211680266U

CN211680266U - Pipe fitting cutting knife

Info

Publication number: CN211680266U
Application number: CN202020322065.9U
Authority: CN
Inventors: 方小金
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-16
Filing date: 2020-03-16
Publication date: 2020-10-16
Anticipated expiration: 2030-03-16

Abstract

The utility model provides a pipe fitting cutting knife relates to pipe fitting cutting equipment technical field. The pipe fitting cutter comprises a shell and an annular rotating seat, wherein the rotating seat is pivoted to the shell, an inner ring is formed in the rotating seat, the rotating seat is provided with a notch for the pipe fitting to enter the inner ring, a supporting assembly and a cutter assembly which face the inner ring are arranged on the rotating seat, and the supporting assembly and the cutter assembly are arranged oppositely; the pipe fitting cutting knife further comprises a first driving assembly and a second driving assembly, and the first driving assembly is mounted on the shell and used for driving the rotating seat to rotate; and a second driving assembly for driving at least one of the feeding and the retreating in the radial direction of the inner ring in both the cutter assembly and the support assembly. The pipe fitting cutting knife is high in operation convenience, the requirement on the operation space around the pipe fitting to be cut is low, and the applicability and the use convenience are high.

Description

Pipe fitting cutting knife

Technical Field

The utility model belongs to the technical field of pipe fitting cutting equipment technique and specifically relates to a pipe fitting cutting knife is related to.

Background

The cutting knife device is generally used for cutting and disconnecting the existing pipe fitting, the pipe fitting needs to be clamped in the cutting knife device during use, then the whole cutting knife device is rotationally cut around the pipe fitting, after once cutting is completed, the cutting knife of the cutting knife device is subjected to feed operation to deepen the cutting depth of the cutting knife to the pipe fitting, then the whole cutting knife device is rotationally cut around the pipe fitting again, so that the pipe fitting is finally cut into two sections, and the operation is complex.

In addition, because above-mentioned cutting knife device needs whole rotatory around the pipe fitting when using, has higher to the peripheral operating space requirement of pipe fitting, and the pipe fitting that needs the cutting sets up side by side with other tubular product, or pipe fitting peripheral operating space is less, leads to current cutting knife device to be unable to use.

Namely, the existing cutting knife device is complex to operate when in use, and the requirement on the operation space around the pipe to be cut is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pipe fitting cutting knife to complex operation when alleviating the cutting knife device that exists among the prior art and using, and treat the higher technical problem of operation space requirement around the cutting pipe fitting.

The embodiment provides a pipe fitting cutter, which comprises a shell and an annular rotating seat, wherein the rotating seat is pivoted to the shell, an inner ring is formed in the rotating seat, the rotating seat is provided with a notch for a pipe fitting to enter the inner ring, a supporting assembly and a cutter assembly which face the inner ring are arranged on the rotating seat, and the supporting assembly and the cutter assembly are arranged oppositely;

the pipe fitting cutting knife further comprises a first driving assembly and a second driving assembly, and the first driving assembly is mounted on the shell and used for driving the rotating seat to rotate; the second drive assembly is used for driving at least one of the feeding or the retreating along the radial direction of the inner ring in both the cutting knife assembly and the support assembly.

In an optional embodiment, the rotating seat is a worm wheel, the first driving assembly includes a first worm, a second worm and a driving piece, a driving end of the driving piece is connected with a first end of the first worm for driving the first worm to rotate, and a second end of the first worm is in transmission connection with a first end of the second worm; the first worm and the second worm are both meshed with the worm wheel.

In an optional embodiment, the first worm is perpendicular to the second worm, and the second end of the first worm is provided with a first bevel gear, the first end of the second worm is provided with a second bevel gear, and the first bevel gear is meshed with the second bevel gear.

In an optional embodiment, a first bearing seat, a second bearing seat, a third bearing seat and a fourth bearing seat are fixedly arranged on the inner wall of the housing, a first end of the first worm is pivoted to the first bearing seat through a bearing, a second end of the first worm is pivoted to the second bearing seat through a bearing, a first end of the second worm is pivoted to the third bearing seat through a bearing, and a second end of the second worm is pivoted to the fourth bearing seat through a bearing.

In an optional implementation manner, the driving member includes a motor and a storage battery connected to the motor, a driving end of the motor is connected to the first worm, a forward rotation button and a reverse rotation button are mounted on the housing, and the forward rotation button and the reverse rotation button are used for controlling the on-off and the steering of the motor.

In an alternative embodiment, the rotating base is provided with two parallel rails, the rails are arranged opposite to the gap, and the rails extend towards the gap; an auxiliary supporting piece is arranged between the two rails in a sliding clamp mode, and the sliding path of the auxiliary supporting piece is overlapped with the inner ring portion.

In an optional embodiment, the auxiliary supporting member includes a support, a receiving hole is formed in the support, a strip-shaped opening is formed in a side wall of the receiving hole along the length direction of the side wall, a blocking member is arranged in the receiving hole, the blocking member divides the receiving hole into a first hole body and a second hole body, a first inserting column is inserted into the first hole body, a first compression spring is connected between the first inserting column and the blocking member, a first adjusting member is fixedly connected to the first inserting column, and the first adjusting member extends out of the strip-shaped opening; a second inserting column is inserted into the second hole body, a second compression spring is connected between the second inserting column and the blocking piece, a second adjusting piece is fixedly connected to the second inserting column, and the second adjusting piece extends out of the strip-shaped opening;

the two opposite side walls of the tracks are provided with inserting grooves along the length direction, and the extending end of the first inserting column and the extending end of the second inserting column are respectively inserted into the two inserting grooves.

In an alternative embodiment, the second drive assembly includes an arcuate rack disposed on the housing; the cutting knife assembly comprises a knife wheel, a first screw rod and a first gear, the first gear is rotationally connected to the rotating seat, the first screw rod is in threaded connection with an inner hole of the first gear, the knife wheel is installed at one end, facing the inner ring, of the first screw rod, and the first gear is matched with the arc-shaped rack;

and/or, the supporting component comprises a supporting wheel, a second screw rod and a second gear, the second gear is rotatably connected with the rotating seat, the second screw rod is in threaded connection with an inner hole of the second gear, the supporting wheel is installed at one end, facing the inner ring, of the second screw rod, and the second gear is matched with the arc-shaped rack.

In an optional embodiment, the cutter assembly comprises a cutter wheel, a first screw rod and a first gear, the first gear is rotatably connected to the rotating seat, the first screw rod is in threaded connection with an inner hole of the first gear, and the cutter wheel is mounted at one end of the first screw rod, which faces the inner ring; the supporting assembly comprises a supporting wheel, a second screw rod and a second gear, the second gear is rotatably connected to the rotating seat, the second screw rod is in threaded connection with an inner hole of the second gear, and the supporting wheel is mounted at one end, facing the inner ring, of the second screw rod;

the second driving assembly comprises two arc-shaped racks arranged on the shell, the two arc-shaped racks can be meshed with the first gear and the second gear in a matching mode, and when the first gear is meshed with one of the arc-shaped racks, the second gear is meshed with the other arc-shaped rack.

In an optional embodiment, the number of the support wheels is multiple, the plurality of support wheels are all pivoted to the second screw rod, the plurality of support wheels are arranged along the circumferential direction of the inner ring, and the axial direction of the support wheels is consistent with the axial direction of the inner ring.

In an optional implementation mode, the pipe fitting cutter further comprises two groups of guide assemblies, and the two groups of guide assemblies are respectively arranged on two sides of the rotating seat; the guide assembly comprises a guide rail and a guide groove which are matched with each other in a sliding manner, and one of the guide rail and the guide groove is arranged on the side wall of the rotating seat and is coaxial with the rotating seat; the other is arranged on the shell.

In an optional embodiment, the pipe fitting cutter further comprises two groups of guide assemblies, and the two groups of guide assemblies are respectively arranged on two sides of the rotating seat; the guide assembly comprises a first groove body, a second groove body and a plurality of balls, wherein one of the first groove body and the second groove body is arranged on the side wall of the rotating seat and is coaxial with the rotating seat; the other is arranged on the shell, and the balls are all clamped between the first groove body and the second groove body.

The utility model discloses beneficial effect of pipe fitting cutting knife includes:

the utility model provides a pipe fitting cutting knife, which comprises a shell providing an installation space and a rotating seat used as an installation base, wherein the rotating seat is provided with a notch for the pipe fitting to pass in and out an inner ring of the pipe fitting, and the rotating seat is provided with a supporting component for supporting the pipe fitting positioned in the inner ring and a cutting knife component for cutting the pipe fitting; the shell is provided with a first driving assembly for driving the rotating seat to rotate and a second driving assembly for driving at least one of the cutting knife assembly and the supporting assembly to feed or retreat.

In the cutting knife assembly and the supporting assembly, the second driving assembly only can drive the cutting knife assembly to move in and out is taken as an example for explanation, and initially, the second driving assembly drives the cutting knife assembly to move in and out to increase the distance between the cutting knife assembly and the supporting assembly and ensure that a pipe to be cut can smoothly enter the inner ring; the pipe to be cut enters the inner ring of the rotating seat along the radial direction through the notch of the rotating seat, or the pipe cutter is operated to sleeve the rotating seat on the pipe to be cut through the notch along the radial direction, then the second driving assembly is controlled to drive the cutting knife assembly to feed towards the inner ring, the distance between the cutting knife assembly and the supporting assembly is reduced until the cutting knife assembly and the supporting assembly clamp the to-be-cut part of the pipe to be cut, and the cutting depth of the pipe to be cut is controlled by setting the feeding amount of the cutting knife assembly; then, controlling a first driving assembly to drive a rotating seat to rotate, driving a supporting assembly and a cutting knife assembly to synchronously rotate along with the rotating seat, enabling the supporting assembly and the cutting knife assembly to rotate around the circumferential direction of the pipe to be cut, cutting the circumferential direction of the clamping position by the cutting knife assembly for one or more circles, and closing the first driving assembly; and then, the second driving assembly is controlled again to drive the cutting knife assembly to feed so as to deepen the cutting depth of the pipe fitting, the first driving assembly is controlled again to drive the rotating seat to rotate, the cutting knife assembly cuts the pipe fitting to be cut again around the circumferential direction of the clamping position, and the operation is repeated until the pipe fitting to be cut is cut off at the clamping position, so that the pipe fitting is cut.

And after the cutting is finished, controlling the second driving assembly to drive the cutter assembly to retract to the initial position. The working principle that the second driving assembly can only drive the supporting assembly to feed or retreat, or can simultaneously drive the supporting assembly and the cutting knife assembly to feed or retreat is similar to that described above, and is not described again here.

When the pipe fitting cutting knife is used, the pipe fitting to be cut can be cut only by controlling the opening states of the first driving assembly and the second driving assembly, and the operation is high in convenience and rapidness; in addition, the pipe fitting cutting knife does not need to be rotated in the cutting process, and the pipe fitting to be cut can be cut by the inner ring which can enter the pipe fitting cutting knife, so that the requirement on the operation space around the pipe fitting to be cut in the cutting process is reduced, and the applicability and the use convenience of the pipe fitting cutting knife are improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of an internal structure of a pipe cutter in a first state according to an embodiment of the present invention;

fig. 2 is a schematic view of the internal structure of the pipe cutter in the second state according to the embodiment of the present invention;

fig. 3 is a partial schematic view of a housing in a pipe cutter according to an embodiment of the present invention;

fig. 4 is a schematic view of an internal structure of the pipe cutter according to the embodiment of the present invention when an auxiliary supporting member is provided;

fig. 5 is a schematic view of the internal structure of the auxiliary supporting member of fig. 4.

Icon: 100-a housing; 110-a first bearing seat; 120-a second bearing seat; 130-a third bearing housing; 140-a fourth bearing seat; 150-a first arcuate rack; 160-a second arc-shaped rack; 170-first trough; 180-a handle; 190-a through-hole; 200-a worm gear; 210-inner ring; 220-notch; 230-a second trough body; 310-a first worm; 311-a first bevel gear; 320-a second worm; 321-a second bevel gear; 330-a motor; 340-a storage battery; 350-forward rotation button; 360-reverse button; 400-a cutter assembly; 410-a cutter wheel; 420-a first gear; 430-a first lead screw; 500-a support assembly; 510-a support wheel; 520-a second lead screw; 530-a second gear; 540-pivoting base; 600-a track; 610-scale; 700-an auxiliary support; 710-a support; 711-bar shaped openings; 720-barrier; 731-first pore body; 732-a first peg; 733 — first compression spring; 734-a first adjustment member; 741-a second porous body; 742-a second peg; 743-a second compression spring; 744-second adjustment member.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are usually placed when in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

The embodiment provides a pipe cutter, as shown in fig. 1 and fig. 2, which includes a housing 100 and an annular rotating seat, the rotating seat is pivoted to the housing 100, an inner ring 210 is formed in the rotating seat, the rotating seat is provided with a notch 220 for a pipe to enter the inner ring 210, a supporting assembly 500 and a cutter assembly 400 which both face the inner ring 210 are installed on the rotating seat, and the supporting assembly 500 and the cutter assembly 400 are arranged oppositely; the pipe fitting cutter further comprises a first driving assembly and a second driving assembly, wherein the first driving assembly is mounted on the shell 100 and is used for driving the rotating seat to rotate; in both the cutter assembly 400 and the support assembly 500, a second drive assembly is used to drive at least one of the feed or the retraction in the radial direction of the inner ring 210.

The pipe fitting cutter provided by the embodiment comprises a shell 100 providing an installation space and a rotating seat serving as an installation base, wherein the rotating seat is provided with a notch 220 for a pipe fitting to enter and exit an inner ring 210 of the rotating seat, and the rotating seat is provided with a supporting assembly 500 for supporting the pipe fitting positioned in the inner ring 210 and a cutter assembly 400 for cutting the pipe fitting; the housing 100 is provided with a first driving assembly for driving the rotation of the rotary base, and a second driving assembly for driving at least one of the cutter assembly 400 and the support assembly 500 to advance or retreat.

In the cutting knife assembly 400 and the supporting assembly 500, the second driving assembly is used to drive the cutting knife assembly 400 to move forward and backward, and initially, the second driving assembly drives the cutting knife assembly 400 to move backward, so as to increase the distance between the cutting knife assembly 400 and the supporting assembly 500 and ensure that the pipe to be cut can smoothly enter the inner ring 210; the pipe to be cut enters the inner ring 210 of the rotating seat along the radial direction through the notch 220 of the rotating seat, or the pipe cutter is operated to sleeve the rotating seat on the pipe to be cut through the notch 220 along the radial direction, then the second driving assembly is controlled to drive the cutter assembly 400 to feed towards the inner ring 210, the distance between the cutter assembly 400 and the supporting assembly 500 is reduced until the cutter assembly 400 and the supporting assembly 500 clamp the pipe to be cut, and the cutting depth is controlled by setting the feeding amount of the cutter assembly 400; then, controlling the first driving assembly to drive the rotating seat to rotate, wherein the rotating seat drives the supporting assembly 500 and the cutting knife assembly 400 to synchronously rotate along with the rotating seat, so that the supporting assembly 500 and the cutting knife assembly 400 rotate around the circumferential direction of the pipe to be cut, the cutting knife assembly 400 cuts one or more circles of circumferential direction of the clamping position, and the first driving assembly is closed; and then, the second driving assembly is controlled again to drive the cutting knife assembly 400 to feed so as to deepen the cutting depth of the cutting knife assembly, the first driving assembly is controlled again to drive the rotating base to rotate, the cutting knife assembly 400 cuts the pipe to be cut again around the circumferential direction of the clamping position, and the operation is repeated until the pipe to be cut is cut off at the clamping position, so that the cutting of the pipe is completed.

After the cutting is finished, the second driving assembly is controlled to drive the cutter assembly 400 to retract to the initial position. The second driving assembly can also be used for driving the support assembly 500 to advance or retreat along the radial direction of the inner ring 210, and the working principle of the second driving assembly that only can drive the support assembly 500 to advance or retreat, or can simultaneously drive the support assembly 500 and the cutter assembly 400 to advance or retreat is similar to that described above, and is not described again here.

When the pipe fitting cutting knife is used, the pipe fitting to be cut can be cut only by controlling the opening states of the first driving assembly and the second driving assembly, and the operation is high in convenience and rapidness; in addition, the pipe fitting cutting knife does not need to be rotated in the cutting process, and the pipe fitting to be cut can be cut by only entering the inner ring 210 of the pipe fitting cutting knife, so that the requirement on the operation space around the pipe fitting to be cut in the cutting process is reduced, and the applicability and the use convenience of the pipe fitting cutting knife are improved.

Specifically, the pipe cutter can be used for cutting pipes such as copper pipes, pvc (polyvinyl chloride) pipes, ppr (polypropylene random copolymer) pipes and the like.

In this embodiment, as shown in fig. 4, two parallel rails 600 may be disposed on the rotating base, the rails 600 are disposed opposite to the notches (220), and the rails 600 extend toward the notches 220; the auxiliary support 700 is slidably interposed between the two rails 600, and a sliding path of the auxiliary support 700 partially overlaps the inner ring 210. When the pipe fitting to be cut enters the inner ring of the rotating seat through the notch, the auxiliary supporting piece 700 is adjusted and installed at the position of the track according to the pipe diameter of the pipe fitting to be cut, the side wall of the auxiliary supporting piece facing the notch can be abutted to the pipe fitting to be cut, the auxiliary supporting assembly and the cutting knife assembly jointly support the pipe fitting to be cut, the occurrence of the slippage condition of the pipe fitting to be cut between the supporting assembly and the cutting knife assembly is reduced, the stability of the pipe fitting to be cut when the pipe fitting to be cut is installed on the inner ring is improved, and the cutting knife assembly is. Specifically, the notches, the support assembly, the cutter assembly and the auxiliary support member may be arranged at even intervals along the circumferential direction of the inner ring.

Optionally, in this embodiment, as shown in fig. 4 and fig. 5, the auxiliary supporting member 700 may include a supporting seat 710, a receiving hole is formed in the supporting seat 710, a strip-shaped opening 711 is formed in a side wall of the receiving hole along a length direction of the receiving hole, a blocking member 720 is formed in the receiving hole, the blocking member 720 divides the receiving hole into a first hole 731 and a second hole 741, a first inserting column 732 is inserted into the first hole 731, a first compression spring 733 is connected between the first inserting column 732 and the blocking member 720, a first adjusting member 734 is fixedly connected to the first inserting column 732, and the first adjusting member 734 extends out through the strip-shaped opening 711; a second plug-in column 742 is plugged into the second hole 741, a second compression spring 743 is connected between the second plug-in column 742 and the blocking member 720, a second adjusting member 744 is fixedly connected to the second plug-in column 742, and the second adjusting member 744 extends out through the strip-shaped opening 711; the opposite side walls of the two rails 600 are provided with insertion grooves along the length direction thereof, and the extending end of the first insertion column 732 and the extending end of the second insertion column 742 are respectively inserted into the two insertion grooves.

When the position of the auxiliary supporting piece needs to be adjusted, the first adjusting piece 734 and the second adjusting piece 744 are pulled along the strip-shaped opening 711 in an opposite direction, the first inserting column correspondingly compresses the first compression spring and retracts into the first hole body, the second inserting column correspondingly compresses the second compression spring and retracts into the second hole body, the first inserting column and the second inserting column are separated from being inserted into the track, then the position of the auxiliary supporting piece is adjusted along the length direction of the track, the abutting support position of the pipe piece to be cut in the inner ring is correspondingly adjusted, after the position adjustment is completed, the first adjusting piece and the second adjusting piece are loosened, and the first adjusting piece and the second adjusting piece extend outwards under the reset acting force of the first compression spring and the second compression spring and are inserted into the inserting grooves of the corresponding track. The inserting end is inserted into the blind hole when the auxiliary supporting piece needs to adjust the position, the inserting end is separated from the blind hole and is located in the inserting groove, the inserting end slides along the inserting groove, and when the auxiliary supporting piece reaches a set position, the inserting end is inserted into the blind hole, so that the inserting firmness and the relative sliding position accuracy of the inserting groove and the track are improved.

Optionally, scale 610 can be arranged on the track, and scale 610 displays the pipe diameter of the pipe to be cut, which is correspondingly supported when the auxiliary supporting piece slides to the position, so that the use convenience of the pipe cutter is improved.

Alternatively, in this embodiment, as shown in fig. 1 and fig. 2, the rotating base is a worm wheel 200, the first driving assembly includes a first worm 310, a second worm 320 and a driving member, a driving end of the driving member is connected to a first end of the first worm 310 for driving the first worm 310 to rotate, and a second end of the first worm 310 is in transmission connection with a first end of the second worm 320; the first worm 310 and the second worm 320 are both engaged with the worm wheel 200. In this embodiment, the first worm 310 and the second worm 320 are engaged with the worm wheel 200 at different positions for transmission, and when the driving member is turned on, the driving member drives the first worm 310 to rotate, on one hand, the first worm 310 transmits its rotation to the worm wheel 200 to drive the worm wheel 200 to rotate; on the other hand, the first worm 310 transmits the rotation motion to the second worm 320, the second worm 320 rotates and simultaneously transmits the rotation motion to the worm wheel 200, and the worm wheel 200 rotates under the dual driving of the first worm 310 and the second worm 320, so as to drive the supporting assembly 500 and the cutting knife assembly 400 to circumferentially cut the pipe to be cut.

The first worm 310 and the second worm 320 are arranged at an angle, and when the worm wheel 200 rotates, as shown in fig. 1, when the notch 220 on the worm wheel 200 simultaneously deviates from the first worm 310 and the second worm 320, the first worm 310 and the second worm 320 simultaneously drive the worm wheel 200 to rotate; when the notch 220 on the worm wheel 200 rotates to face the first worm 310, the first worm 310 cannot be meshed with the notch 220, and at the moment, the second worm 320 is still meshed with the worm wheel 200 for transmission to drive the worm wheel 200 to rotate; similarly, as shown in fig. 2, when the notch 220 on the worm wheel 200 is rotated to face the second worm 320, the second worm 320 cannot be meshed with the notch 220, and at this time, the first worm 310 is still meshed with the worm wheel 200 to drive the worm wheel 200 to rotate. That is, the first worm 310 and the second worm 320 are provided to maintain the continuous driving of the worm wheel 200, so that the worm wheel 200 can rotate continuously, accordingly, the cutting knife assembly 400 can continuously cut the pipe to be cut in the circumferential direction, and the normal use of the pipe cutting knife can be ensured.

Specifically, in the present embodiment, as shown in fig. 1 and fig. 2, the first worm 310 may be disposed perpendicular to the second worm 320, the second end of the first worm 310 is provided with a first bevel gear 311, the first end of the second worm 320 is provided with a second bevel gear 321, and the first bevel gear 311 is engaged with the second bevel gear 321. Here, it is a specific form of relative position and transmission connection between the first worm 310 and the second worm 320, wherein the first worm 310 and the second worm 320 are vertically arranged, so as to facilitate operations such as installation and assembly of the first worm 310 and the second worm 320, and ensure the installation and assembly accuracy; when the device is used, the first worm 310 is driven by the driving part to rotate and drives the first bevel gear 311 to rotate synchronously with the first bevel gear 311, the first bevel gear 311 transmits the rotation motion to the second bevel gear 321, and the second bevel gear 321 rotates and drives the second worm 320 to rotate synchronously with the second bevel gear 321, so that the direction-changing transmission of the rotation motion is realized.

The first worm 310 and the second worm 320 may be arranged at other relative positions according to the angle of the notch 220, besides the above-mentioned vertical arrangement; besides the first worm 310 and the second worm 320 are in transmission connection through bevel gears, direction-changing transmission can also be achieved through universal joints or other structures.

In this embodiment, as shown in fig. 3, the first bearing seat 110, the second bearing seat 120, the third bearing seat 130 and the fourth bearing seat 140 may be fixedly disposed on the inner wall of the housing 100, a first end of the first worm 310 is pivotally connected to the first bearing seat 110 through a bearing, a second end of the first worm 310 is pivotally connected to the second bearing seat 120 through a bearing, a first end of the second worm 320 is pivotally connected to the third bearing seat 130 through a bearing, and a second end of the second worm 320 is pivotally connected to the fourth bearing seat 140 through a bearing. Here, a specific form in which the first worm 310 and the second worm 320 are installed in the housing 100, wherein the first bearing housing 110 and the second bearing housing 120 respectively limit the positions of both ends of the first worm 310 while enabling the rotational movement of the first worm 310; similarly, the third bearing seat 130 and the fourth bearing seat 140 respectively limit the positions of the two ends of the second worm 320, and at the same time, the rotation movement of the second worm 320 can be realized. The arrangement of the first bearing seat 110, the second bearing seat 120, the third bearing seat 130 and the fourth bearing seat 140 can improve the installation position accuracy of the first worm 310 and the second worm 320, thereby improving the transmission connection between the first worm 310 and the second worm 320 and ensuring the transmission driving of the worm wheel 200.

Optionally, in this embodiment, the second driving assembly includes an arc-shaped rack disposed on the housing 100; the cutter assembly 400 comprises a cutter wheel 410, a first screw rod 430 and a first gear 420, the first gear 420 is rotatably connected to the rotating base, the first screw rod 430 is in threaded connection with an inner hole of the first gear 420, the cutter wheel 410 is installed at one end of the first screw rod 430 facing the inner ring 210, and the first gear 420 is matched with the arc-shaped rack. Here is a specific form of the second driving assembly and the cutting knife assembly 400, when the pipe to be cut is located in the inner ring 210 of the rotating base, the first driving assembly drives the rotating base to rotate, and simultaneously drives the cutting knife assembly 400 to rotate synchronously therewith, when the cutting knife assembly 400 rotates to the position of the arc-shaped rack, the first gear 420 of the cutting knife assembly 400 is meshed with the arc-shaped rack, and the first gear 420 rotates around the axis thereof under the rotation driving of the rotating base and the meshing transmission of the arc-shaped rack, because the first gear 420 is installed on the rotating base, the first gear 420 can only rotate relatively to the rotating base, and cannot displace, therefore, the rotating motion of the first gear 420 can drive the first lead screw 430 to move axially.

Specifically, when the first driving assembly drives the rotating base to rotate towards the first direction, and the first gear 420 is meshed with the arc-shaped rack, the first gear 420 drives the first lead screw 430 to extend towards the inner ring 210, the first lead screw 430 drives the cutter wheel 410 to realize feed operation, and when the rotating base rotates for one circle, the cutter wheel 410 performs circumferential one-circle cutting on the pipe to be cut, and can realize one-time automatic feed operation until the cutting of the pipe to be cut is completed. Similarly, when the first driving assembly drives the rotating base to rotate towards the second direction and the first gear 420 is engaged with the arc-shaped rack, the first gear 420 drives the first lead screw 430 to retract away from the inner ring 210, the first lead screw 430 drives the cutter wheel 410 to retract, and each time the rotating base rotates for one circle, the first lead screw 430 drives the cutter wheel 410 to retract for a certain distance until the cutter wheel 410 retracts to the initial position.

When the second driving assembly and the cutting knife assembly 400 adopt the above form, the actual driving source in the pipe cutting knife is only the first driving assembly, so that the cutting and feeding and retracting operations of the pipe to be cut are simultaneously realized by adopting a single driving source, and the pipe cutting knife is simple in structure and convenient and fast to operate. Specifically, a bearing seat may be fixedly disposed on the rotating seat, and a bearing is fixedly disposed at a side end of the first gear 420, and the bearing is pivotally connected to the bearing seat, so that the first gear 420 is rotatably connected to the rotating seat.

When the arc-shaped rack is one, in addition to the arc-shaped rack matching the first gear 420 of the cutter assembly 400, the support assembly 500 may include a support wheel 510, a second lead screw 520, and a second gear 530, the second gear 530 is rotatably connected to the rotating base, the second lead screw 520 is in threaded connection with an inner hole of the second gear 530, the support wheel 510 is installed at one end of the second lead screw 520 facing the inner ring 210, and the second gear 530 matches the arc-shaped rack. When the first driving assembly drives the rotating base to rotate and the second gear 530 is engaged with the arc-shaped rack, the second gear 530 rotates and drives the second lead screw 520 to drive the supporting wheel 510 to feed or retreat towards the inner ring 210, wherein the rotation direction of the rotating base determines the rotation direction of the second gear 530, and further determines the feeding movement or the retreating movement of the second lead screw 520 and the supporting wheel 510. The specific working principle is similar to that of the cutter assembly 400, and the detailed description is omitted here. Specifically, a bearing seat may be fixedly disposed on the rotating seat, and a bearing is fixedly disposed at a side end of the second gear 530 and pivotally connected to the bearing seat, so as to rotatably connect the second gear 530 to the rotating seat.

It should be noted that, when the arc-shaped rack is one, the arc-shaped rack can only be matched with the first gear 420 of the cutting knife assembly 400, and when the rotating base rotates for one turn, the arc-shaped rack and the first gear 420 are in matched transmission once, the first gear 420 drives the knife flywheel 410 to feed for a certain distance or withdraw for a certain distance through the first screw rod 430, and the position of the supporting assembly 500 mounted on the rotating base is unchanged in the cutting process; in addition, the arc-shaped rack can also be matched with the second gear 530 of the supporting assembly 500 only, so that the arc-shaped rack is meshed with the second gear 530 for transmission once when the rotating seat rotates for one circle, the second gear 530 drives the supporting wheel 510 to feed for a certain distance or return for a certain distance through the second screw rod 520, and the feeding or retracting of the cutter wheel 410 is realized by changing the distance between the supporting wheel 510 and the cutter wheel 410. In addition, the arc rack can also be matched with the first gear 420 of the cutting knife assembly 400 and the second gear 530 of the supporting assembly 500 at the same time, so that when the rotating seat rotates for one circle, the arc rack is in transmission with the first gear 420 and the second gear 530 in sequence in a matching manner, the knife flywheel 410 feeds for a certain distance, and the supporting wheel 510 also feeds for a certain distance, which is equivalent to that the cutting knife of the pipe fitting performs one-time feeding operation for each half circle, thereby improving the feeding efficiency and correspondingly improving the cutting efficiency.

Besides the above form of one arc rack, in this embodiment, there may be two arc racks, as shown in fig. 1 to 3, the specific structure is as follows: the cutter assembly 400 comprises a cutter wheel 410, a first screw rod 430 and a first gear 420, the first gear 420 is rotatably connected to the rotating base, the first screw rod 430 is in threaded connection with an inner hole of the first gear 420, and the cutter wheel 410 is installed at one end of the first screw rod 430 facing the inner ring 210; the supporting assembly 500 comprises a supporting wheel 510, a second lead screw 520 and a second gear 530, the second gear 530 is rotatably connected to the rotating base, the second lead screw 520 is in threaded connection with an inner hole of the second gear 530, and the supporting wheel 510 is installed at one end of the second lead screw 520 facing the inner ring 210; the second driving assembly includes two arc-shaped racks disposed on the housing 100, the two arc-shaped racks can be engaged with the first gear 420 and the second gear 530, and when the first gear 420 is engaged with one of the arc-shaped racks, the second gear 530 is engaged with the other arc-shaped rack.

The structure of the supporting assembly 500 and the cutting knife assembly 400 is the same as that described above, the first driving assembly drives the rotating base to rotate, when the first gear 420 is engaged with one of the two arc-shaped racks, the second gear 530 is also engaged with the other arc-shaped rack, during the rotation of the rotating base, the first gear 420 performs a feeding operation (or a retracting operation) on the cutting knife assembly 400, and simultaneously, the second gear 530 performs a feeding operation (or a retracting operation) on the supporting assembly 500, and because the two arc-shaped racks have the same length, the rotating base rotates for one turn, the feeding distance of the cutting knife assembly 400 is equal to that of the supporting assembly 500, the ends of the cutting knife assembly 400 and the supporting assembly 500 facing the inner ring 210 are arranged symmetrically with respect to the center of the inner ring 210, so that the pipe to be cut can be always concentric with the inner ring 210 when clamped between the cutter wheel 410 and the supporting wheel 510, and when the rotating base rotates, every half-circle carries out a feed to reduce cutting knife subassembly 400 or supporting component 500 and feed alone, lead to waiting to cut the pipe fitting and rotate a seat off-centre, when rotating a seat and rotate, wait to cut the pipe fitting and receive the clamping action of cutting knife subassembly 400 and supporting component 500 and take place the emergence of the bending deformation condition, and then reduce the damage to waiting to cut the pipe fitting and the emergence of the dead condition of cutting knife subassembly 400 card. Specifically, as shown in fig. 3, the two arc-shaped racks may be a first arc-shaped rack 150 and a second arc-shaped rack 160, respectively.

Specifically, in this embodiment, as shown in fig. 1 and fig. 2, the driving member may include a motor 330 and a storage battery 340 connected to the motor 330, a driving end of the motor 330 is connected to the first worm 310, a forward rotation button 350 and a reverse rotation button 360 are installed on the housing 100, and the forward rotation button 350 and the reverse rotation button 360 are used for controlling the on/off and the rotation of the motor 330. Here, it is a specific form of the driving member, wherein, when the forward rotation button 350 is pressed, the storage battery 340 supplies power to the motor 330, and the motor 330 rotates forward, the rotating base rotates toward the first direction, the first gear 420 drives the cutter wheel 410 to feed, and the second gear 530 drives the supporting wheel 510 to feed; when the turning button is pressed, the motor 330 rotates reversely, the rotating base rotates towards the second direction, the second gear 530 drives the cutter wheel 410 to retreat, and simultaneously the second gear 530 drives the supporting wheel 510 to retreat. The setting of corotation button 350 and reversal button 360 can improve the simple operation degree of pipe fitting cutting knife greatly. Specifically, the lower portion of the casing 100 may be formed with a handle 180 for the operator's grip, and a forward rotation button 350 and a reverse rotation button 360 may be provided at the position of the handle 180 for the operator's push.

In this embodiment, as shown in fig. 2, the number of the supporting wheels 510 may be multiple, the supporting wheels 510 are all pivoted to the second lead screw 520, the supporting wheels 510 are arranged along the circumferential direction of the inner ring 210, and the axial direction of the supporting wheels 510 is the same as the axial direction of the inner ring 210. The knife flywheel 410 and the supporting wheel 510 clamp the pipe to be cut together, on one hand, the supporting wheel 510 is pivoted to the second screw rod 520, and along with the rotation of the rotating base, relative rolling motion occurs between the supporting wheel 510 and the pipe to be cut on the basis of supporting, so that the friction force between the supporting wheel 510 and the pipe to be cut is reduced, the rotating resistance of the rotating base is reduced, and the rotating smoothness of the rotating base is improved. On the other hand, a plurality of supporting wheels 510 support the different positions in the circumference of the pipe to be cut, so that the fixing firmness of the supporting wheels 510 and the cutter wheel 410 on the pipe to be cut can be effectively improved, and the rolling-out situation of the pipe to be cut from the supporting wheels 510 and the cutter wheel 410 is reduced. Specifically, the pivot seat 540 may be fixedly connected to an end of the second lead screw 520 facing the inner ring 210, and the support wheel 510 may be a bearing, and a plurality of bearings are all pivoted to the pivot seat 540.

In this embodiment, the pipe cutter may further include two sets of guide assemblies, and the two sets of guide assemblies are respectively disposed on two sides of the rotating seat; the guide assembly comprises a guide rail and a guide groove which are matched with each other in a sliding manner, and one of the guide rail and the guide groove is arranged on the side wall of the rotating seat and is coaxial with the rotating seat; the other is provided in the housing 100. Here, a specific form of the rotating base pivotally connected to the casing 100 is described by taking an example that the rotating base is provided with a guide groove and the casing 100 is provided with a guide rail, specifically, the casing 100 may include a first casing and a second casing which sandwich the rotating base therebetween, two sides of the rotating base are respectively provided with one guide groove, the first casing and the second casing are respectively provided with one guide rail, the two guide rails limit the axial position of the rotating base through the two guide grooves, and when the rotating base rotates under the driving action of the first driving assembly, the rotating base can only rotate under the guiding action of the guide rails, so as to improve the position accuracy of the rotation of the rotating base. Specifically, the first casing 100 and the second casing 100 are also provided with openings and penetrating holes 190 corresponding to the notches 220 of the rotating base and the inner ring 210, so that the pipe to be cut can enter and exit the inner ring 210.

In addition to the above, the housing 100 may be provided with a guide groove and the rotating base may be provided with a guide rail.

In this embodiment, the rotating base may be pivoted to the housing 100 in the following manner, and the pipe cutter may further include two sets of guide assemblies respectively disposed at two sides of the rotating base; the guide assembly comprises a first groove body 170, a second groove body 230 and a plurality of balls, wherein one of the first groove body 170 and the second groove body 230 is arranged on the side wall of the rotating seat and is coaxial with the rotating seat; the other is arranged in the housing 100, and a plurality of balls are all clamped between the first slot 170 and the second slot 230. The housing 100 limits the axial position of the rotating seat, and during the rotation of the rotating seat, the first groove body 170, the balls and the second groove body 230 jointly limit the circumferential rotation position of the rotating seat so as to improve the rotation position precision of the rotating seat; in addition, the arrangement of the balls makes rolling friction between the rotating seat and the shell 100, so that the resistance between the rotating process of the rotating seat and the shell 100 is reduced, and the smoothness of the rotation of the rotating seat is improved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. The pipe fitting cutter is characterized by comprising a shell (100) and an annular rotating seat, wherein the rotating seat is pivoted to the shell (100), an inner ring (210) is formed in the rotating seat, the rotating seat is provided with a notch (220) for a pipe fitting to enter the inner ring (210), a supporting assembly (500) and a cutter assembly (400) which face the inner ring (210) are installed on the rotating seat, and the supporting assembly (500) and the cutter assembly (400) are arranged oppositely;

the pipe fitting cutting knife further comprises a first driving assembly and a second driving assembly, and the first driving assembly is mounted on the shell (100) and used for driving the rotating seat to rotate; in both the cutter assembly (400) and the support assembly (500), the second drive assembly is for driving at least one of the feed or the retraction in a radial direction of the inner ring (210).

2. The pipe cutter according to claim 1, wherein the rotating seat is a worm gear (200), the first driving assembly comprises a first worm (310), a second worm (320) and a driving member, the driving member has a driving end connected to the first end of the first worm (310) for driving the first worm (310) to rotate, and the second end of the first worm (310) is in transmission connection with the first end of the second worm (320); the first worm (310) and the second worm (320) are both meshed with the worm wheel (200).

3. The pipe cutter according to claim 2, characterized in that the first worm (310) is arranged perpendicular to the second worm (320), and the second end of the first worm (310) is provided with a first bevel gear (311), and the first end of the second worm (320) is provided with a second bevel gear (321), the first bevel gear (311) meshing with the second bevel gear (321).

4. The pipe cutter according to claim 1, characterized in that the rotary holder is provided with two parallel rails (600), the rails (600) being arranged opposite the gap (220), and the rails (600) extending towards the gap (220); an auxiliary support member (700) is slidably clamped between the two rails (600), and a sliding path of the auxiliary support member (700) is partially overlapped with the inner ring (210).

5. The pipe cutting knife according to claim 4, characterized in that the auxiliary supporting member (700) comprises a support (710), a receiving hole is formed in the support (710), a strip-shaped opening (711) is formed in a side wall of the receiving hole along a length direction of the receiving hole, a blocking member (720) is arranged in the receiving hole, the blocking member (720) divides the receiving hole into a first hole body (731) and a second hole body (741), a first inserting column (732) is inserted into the first hole body (731), a first compression spring (733) is connected between the first inserting column (732) and the blocking member (720), a first adjusting member (734) is fixedly connected to the first inserting column (732), and the first adjusting member (734) extends out through the strip-shaped opening (711); a second inserting column (742) is inserted into the second hole body (741), a second compression spring (743) is connected between the second inserting column (742) and the blocking part (720), a second adjusting part (744) is fixedly connected to the second inserting column (742), and the second adjusting part (744) extends out through the strip-shaped opening (711);

the opposite side walls of the two rails (600) are respectively provided with an insertion groove along the length direction, and the extending end of the first insertion column (732) and the extending end of the second insertion column (742) are respectively inserted into the two insertion grooves.

6. The pipe cutter according to any of claims 1-5 characterized in that the second drive assembly comprises an arc-shaped rack provided in the housing (100); the cutter assembly (400) comprises a cutter wheel (410), a first screw rod (430) and a first gear (420), the first gear (420) is rotatably connected to the rotating seat, the first screw rod (430) is in threaded connection with an inner hole of the first gear (420), the cutter wheel (410) is installed at one end, facing the inner ring (210), of the first screw rod (430), and the first gear (420) is matched with the arc-shaped rack;

and/or, the supporting component (500) comprises a supporting wheel (510), a second screw rod (520) and a second gear (530), the second gear (530) is rotatably connected to the rotating seat, the second screw rod (520) is in threaded connection with an inner hole of the second gear (530), the supporting wheel (510) is installed at one end, facing the inner ring (210), of the second screw rod (520), and the second gear (530) is matched with the arc-shaped rack.

7. The pipe cutter according to any of the claims 1-5, characterized in that the cutter assembly (400) comprises a cutter wheel (410), a first lead screw (430) and a first gear (420), the first gear (420) is rotatably connected to the rotating base, the first lead screw (430) is in threaded connection with the inner hole of the first gear (420), the cutter wheel (410) is mounted on one end of the first lead screw (430) facing the inner ring (210); the supporting assembly (500) comprises a supporting wheel (510), a second screw rod (520) and a second gear (530), the second gear (530) is rotatably connected to the rotating seat, the second screw rod (520) is in threaded connection with an inner hole of the second gear (530), and the supporting wheel (510) is mounted at one end, facing the inner ring (210), of the second screw rod (520);

the second driving assembly comprises two arc-shaped racks arranged on the shell (100), the two arc-shaped racks can be meshed with the first gear (420) and the second gear (530) in a matching mode, and when the first gear (420) is meshed with one of the arc-shaped racks, the second gear (530) is meshed with the other arc-shaped rack.

8. The pipe cutter according to claim 7, characterized in that the supporting wheels (510) are plural, a plurality of the supporting wheels (510) are all pivoted to the second lead screw (520), the plurality of the supporting wheels (510) are arranged along the circumferential direction of the inner ring (210), and the axial direction of the supporting wheels (510) is consistent with the axial direction of the inner ring (210).

9. The pipe cutter according to any one of claims 1 to 5, characterized in that the pipe cutter further comprises two sets of guide assemblies, which are respectively disposed on both sides of the rotating base; the guide assembly comprises a guide rail and a guide groove which are matched with each other in a sliding manner, and one of the guide rail and the guide groove is arranged on the side wall of the rotating seat and is coaxial with the rotating seat; the other is provided in the housing (100).

10. The pipe cutter according to any one of claims 1 to 5, characterized in that the pipe cutter further comprises two sets of guide assemblies, which are respectively disposed on both sides of the rotating base; the guide assembly comprises a first groove body (170), a second groove body (230) and a plurality of balls, wherein one of the first groove body (170) and the second groove body (230) is arranged on the side wall of the rotating seat and is coaxial with the rotating seat; the other is arranged on the shell (100), and the balls are all clamped between the first groove body (170) and the second groove body (230).