CN215880105U - Electric pipe cutter - Google Patents

Abstract

The utility model provides an electric pipe cutter, which solves the problems of low pipe cutting efficiency and the like and comprises a holding part and a cutting part, wherein a driving mechanism is arranged in the holding part, the output end of the driving mechanism is connected with a transmission mechanism arranged in the cutting part, a pipe cutter is arranged in the cutting part, the pipe cutter is linked with the transmission mechanism through a gear transmission assembly and rotates relative to the cutting part, a jaw for cutting a pipe is formed between the pipe cutter and the cutting part, the driving mechanism comprises a driving motor arranged in the holding part, a power supply assembly connected with the driving motor is arranged at the lower end of the holding part, the driving motor is connected with a control assembly, and a planetary gear speed reducing mechanism is arranged between the transmission mechanism and the gear transmission assembly. The utility model has the advantages of good cutting effect, stable work and the like.

Description

Electric pipe cutter

Technical Field

The utility model belongs to the technical field of cutting devices, and particularly relates to an electric pipe cutter.

Background

Pipe cutters are commonly classified into fixed-point operation type and portable type as cutting devices commonly used in industrial production. The fixed-point operation type is mainly suitable for cutting hard metal pipe fittings or large-aperture metal pipe fittings, and the portable type is mainly used for cutting copper pipes, thin-wall metal pipe fittings or small-aperture metal pipe fittings. The fixed-point operation type pipe cutter is matched with an air-pushing oil type pipe cutter, an electric system controls the movement direction of an air pressure system to push an oil path to do linear reciprocating movement, and the movement of the air path and the oil path is controlled and changed according to signals detected by the limiting of the carriage in the reciprocating movement, so that an expected feed route is achieved. And the portable pipe cutter drives the cutting blade to rotate at a high speed in an electric driving mode, so that pipe cutting is realized. However, in the actual use process, the portable pipe cutter is inconvenient for fixing the pipe fitting, and the cutting quality is affected by dislocation easily during cutting. In addition, the cutting efficiency of the common rotary cutting mode is low, and the rotary cutting mode is not suitable for cutting off large-batch pipe fittings.

In order to solve the defects of the prior art, people have long searched for and put forward various solutions. For example, the chinese patent document discloses a clamping device for a cutting head of a pipe cutter and a corresponding cutting head and pipe cutter [201210509554.5], comprising first and second carriages carrying a blade and a carriage, respectively, which are slidable in linearly opposite and opposite directions within the cutting head; the pipe to be cut is loaded between the blade and the bracket; the clamping device also comprises a first driving arm and a second driving arm, a first elastic part is arranged between the first driving arm and the first sliding frame, and a second elastic part is arranged between the second driving arm and the second sliding frame; the first and second driving arms can drive the first and second carriages to move along the linear opposite directions through the elastic force of the first and second elastic members respectively; the first and second elastic members generate elastic force due to the first and second driving arms driving the first and second carriages to move in linearly opposite directions, which is cutting pressure of the blade and the carriage against the pipe to be cut.

The scheme solves the problem of pipe cutting positioning to a certain extent, but the scheme still has a plurality of defects, such as low pipe cutting efficiency and the like.

Disclosure of Invention

The utility model aims to solve the problems and provides an electric pipe cutter with reasonable design and high cutting efficiency.

In order to achieve the purpose, the utility model adopts the following technical scheme: this electrodynamic type pipe cutter, including portion of gripping and cutting portion, be provided with actuating mechanism in the portion of gripping, the actuating mechanism output is connected with the drive mechanism who sets up in the cutting portion, install the pipe cutter in the cutting portion, the pipe cutter passes through gear drive subassembly and drive mechanism linkage and relative cutting portion and rotates, form the keeping silent that is used for cutting the pipe fitting between pipe cutter and the cutting portion, actuating mechanism is including installing the driving motor in the portion of gripping, the power supply subassembly of being connected with driving motor is installed to the portion of gripping lower extreme, driving motor is connected with control assembly with the power supply subassembly, be provided with planetary gear reduction mechanism between drive mechanism and the gear drive subassembly. The gear transmission assembly is matched with the transmission mechanism to drive the pipe cutter to rotate, so that the pipe fitting can be cut off rapidly by the jaw, and the pipe fitting cutting efficiency is improved.

In above-mentioned electrodynamic type pipe cutter, the power supply unit includes that the battery box body of installing at the portion of gripping lower extreme through detachable subassembly installs the control circuit board of being connected with the battery box body in the portion of gripping, and control circuit board is connected with driving motor, and the portion of gripping outside is provided with switch and the motor switch who is connected with control circuit board. The power supply assembly adopts a detachable battery, can be charged and can directly replace the battery, and the continuous work of the pipe cutter is realized. The driving mechanism is driven in an electric mode, and has better driving stability.

In foretell electrodynamic type pipe cutter, detachable subassembly includes that vertical or slope setting is holding the power supply seat of portion lower extreme, the power supply seat has power supply battery box body male interface, battery box body including main casing body and with main casing body port confined vice lid, be provided with spacing groove and spacing arch of pegging graft each other between main casing body bottom outside and the interface bottom, main casing body both sides are provided with has elastic joint piece, be provided with the draw-in groove and the buckle of mutual joint between the joint piece outside and the interface inboard. The detachable subassembly makes things convenient for the power supply seat dismouting, guarantees power supply stability, has improved the connection stability of power supply seat simultaneously.

In the above-mentioned electrodynamic type pipe cutter, drive mechanism adopts worm and worm wheel meshing transmission, and drive mechanism is including connecting the awl worm at the actuating mechanism output, installs the awl worm wheel with awl worm meshing in the cutting portion. The conical worm is matched with the conical worm wheel to realize torque reversing and change of transmission ratio.

In foretell electrodynamic type pipe cutter, planetary gear reduction mechanism is including installing at the inside gear ring relative with the bevel gear wheel of cutting portion, and the bevel gear wheel center is through initiative pivot fixedly connected with sun gear, and the sun gear is through a plurality of relative and centrosymmetric planetary gears and the inboard meshing transmission of gear ring, and one side that gear ring and bevel gear wheel are relative is closed by spacing dish and the opposite side is provided with the linkage dish of being connected with planetary gear rotation, and the linkage dish center fixedly connected with driven shaft and driven shaft are connected with gear drive assembly. The planetary gear speed reducing mechanism reduces the rotating speed, improves the torque and ensures that the pipe cutter has larger cutting force.

In foretell electrodynamic type pipe cutter, be provided with first rolling bearing between bevel gear and the cutting part, be provided with second rolling bearing between driven spindle and the cutting part, the cutting part inboard is provided with supplies first rolling bearing male first bearing groove and supplies second rolling bearing male second rolling groove, be provided with the installation cavity that supplies gear ring joint in the cutting part, be provided with the mounting groove and the installation arch of a plurality of one-to-one between installation cavity and gear ring junction, the gear ring is through the relative installation cavity circumferential direction location of mounting groove and installation arch of pegging graft each other. The rotating bearing ensures the rotating shaft to rotate stably and reduces transmission loss.

In the above-mentioned electrodynamic type pipe cutter, the gear drive subassembly includes the drive gear who fixes on driven rotating shaft, and the pipe cutter has the meshing portion of relative cutting portion pivoted, and the meshing portion is provided with the rotation tooth that relative meshing portion rotation center circumference distributes with the opposite side of drive gear, and drive gear and rotation tooth intermeshing.

In foretell electrodynamic type pipe cutter, pipe cutter's rotation center department opens has the rotation hole that supplies to rotate the bolt and pass, it has the rotation cover to rotate between bolt and the rotation hole, it is provided with third rolling bearing to rotate between cover and the cutting part, the inboard third bearing groove that supplies third rolling bearing to insert that is provided with of cutting part, it is connected with the rotation nut and relatively fixed with the cutting part to rotate the bolted connection, it has the assembly mouth that supplies to rotate the nut and rotate the bolt grafting fixed to open the cutting part outside, one side that pipe cutter kept away from the locating piece is provided with the spacer, the inboard locating frame that is provided with and the spacer joint of cutting part. The gear transmission assembly drives the pipe cutter to rotate, and meanwhile, the pipe cutter is convenient to replace.

In foretell electrodynamic type pipe cutter, the portion of gripping is formed by a pair of casing amalgamation of gripping, and the portion of gripping has the hand protector, and the cutting part is formed by a pair of cutting casing amalgamation, and the cutting part has curved clamping part, keeps silent the setting between clamping part and pipe cutter, the clamping part has the arc wall that supplies pipe cutter to penetrate, and pipe cutter back of the body is provided with the spacing breach that leans on with the cutting part when rotating to the one side of keeping silent, through splicing mechanism interconnect between the portion of gripping and the cutting part. The jaw is used for clamping the pipe body, and the limit notch limits the opening and closing range of the pipe cutter.

In foretell electrodynamic type pipe cutter, the concatenation mechanism is including setting up the concatenation mouth in the relative one end of portion of gripping and clamping part, the clamping part have with concatenation mouthful fixed connection's concatenation portion, the inboard laminating of concatenation mouth and concatenation portion outside compresses tightly. The holding part and the cutting part can be detached, so that the pipe cutter can be assembled quickly.

Compared with the prior art, the utility model has the advantages that: the pipe cutter rotates under the action of the gear transmission assembly and the transmission mechanism to cut off the pipe fittings in the jaw, so that the pipe fitting cutting efficiency is high; the planetary gear speed reducing mechanism further improves the rotation torque of the pipe cutter and ensures the cutting effect of the pipe cutter; the pipe cutter is convenient to disassemble and assemble and is convenient to assemble quickly.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is another schematic structural view of the present invention;

FIG. 3 is a schematic view of the transmission configuration of the present invention;

FIG. 4 is a structural cross-sectional view of the present invention;

FIG. 5 is a schematic illustration of the splice of the gripping portion and cutting portion of the present invention;

FIG. 6 is a structural cross-sectional view of the cutting housing of the present invention;

FIG. 7 is a structural cross-sectional view of another cutting housing of the present invention;

FIG. 8 is a structural sectional view of a cutting part of the present invention;

fig. 9 is a structural sectional view of a battery case of the present invention;

FIG. 10 is a structural cross-sectional view of the pipe cutter of the present invention;

in the figure, a holding part 1, a holding shell 11, a hand guard 12, a splicing mechanism 13, a splicing port 14, a splicing part 15, a cutting part 2, an assembling port 21, a positioning sheet 22, a positioning frame 23, a cutting shell 24, a clamping part 25, an arc-shaped groove 26, a driving mechanism 3, a driving motor 31, a power supply assembly 32, a control assembly 33, a battery box body 34, a control circuit board 35, a power switch 36, a motor switch 37, a transmission mechanism 4, a conical worm 41, a conical worm wheel 42, a first rotating bearing 43, a second rotating bearing 44, a first bearing groove 45, a second rotating groove 46, a mounting cavity 47, a mounting groove 48, a mounting protrusion 49, a pipe cutter 5, a limiting notch 51, a gear transmission assembly 6, a driving gear 61, a meshing part 62, a rotating tooth 63, a rotating bolt 64, a rotating hole 65, a rotating sleeve 66, a third rotating bearing 67, a third bearing groove 68, a rotating nut 69, a jaw 7, a cutting edge 2, a cutting part 21, a positioning frame 23, a cutting shell 24, a clamping part 25, a clamping part 26, a clamping part, a driving mechanism 3, a driving mechanism, a first rotating groove 46, a second rotating groove, a third rotating groove, a second rotating groove, a third rotating groove, a second rotating part, the detachable component 8, the power supply seat 81, the socket 82, the main housing 83, the auxiliary cover 84, the limiting groove 85, the limiting protrusion 86, the clamping piece 87, the clamping groove 88, the buckle 89, the planetary gear speed reducing mechanism 9, the gear ring 91, the driving rotating shaft 92, the sun gear 93, the planetary gear 94, the linkage disc 95 and the driven rotating shaft 96.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-10, the electric pipe cutter includes a holding portion 1 and a cutting portion 2, a driving mechanism 3 is disposed in the holding portion 1, an output end of the driving mechanism 3 is connected to a transmission mechanism 4 disposed in the cutting portion 2, a pipe cutter 5 is disposed in the cutting portion 2, the pipe cutter 5 is linked with the transmission mechanism 4 through a gear transmission assembly 6 and rotates relative to the cutting portion 2, a jaw 7 for cutting a pipe fitting is formed between the pipe cutter 5 and the cutting portion 2, the driving mechanism 3 includes a driving motor 31 disposed in the holding portion 1, a power supply assembly 32 connected to the driving motor 31 is disposed at a lower end of the holding portion 1, the driving motor 31 and the power supply assembly 32 are connected to a control assembly 33, and a planetary gear reduction mechanism 9 is disposed between the transmission mechanism 4 and the gear transmission assembly 6. The torque of the driving mechanism 3 is transmitted to the pipe cutter 5 through the transmission mechanism 4 and the gear transmission assembly 6, so that the pipe cutter 5 rotates to cut off the pipe fitting clamped in the jaw 7 along the radial direction.

In depth, the power supply assembly 32 includes a battery box 34 mounted at the lower end of the grip part 1 through the detachable assembly 8, a control circuit board 35 connected with the battery box 34 is mounted in the grip part 1, the control circuit board 35 is connected with the driving motor 31, and a power switch 36 and a motor switch 37 connected with the control circuit board 35 are arranged outside the grip part 1. The battery box 34 is provided with a rechargeable battery inside, the control circuit board 35 controls the input power of the driving motor 31, and when in use, the power switch 36 needs to be turned on, and then the motor switch 37 is pressed to start the driving motor 31. The drive motor 31 is powered by a power supply assembly 32 and power limited by a control assembly 33.

Further, detachable subassembly 8 includes vertical or slope setting at the power supply seat 81 of the lower extreme of the portion of gripping 1, power supply seat 81 has the bayonet socket 82 that supplies battery box 34 male, battery box 34 include main casing body 83 and with main casing body 83 port confined vice lid 84, be provided with spacing groove 85 and spacing arch 86 of mutual grafting between the main casing body 83 bottom outside and the bayonet socket 82 bottom, main casing body 83 both sides are provided with and have elastic joint piece 87, be provided with draw-in groove 88 and the buckle 89 of mutual joint between the joint piece 87 outside and the bayonet socket 82 inboard. The battery box body 34 can be plugged relative to the power supply seat 81, and the clamping sheets 87 at the two sides of the battery box body 34 can be pressed to separate and unlock the clamping groove 88 and the clamping buckle 89.

Besides, the transmission mechanism 4 adopts worm and worm wheel meshing transmission, the transmission mechanism 4 comprises a conical worm 41 connected to the output end of the driving mechanism 3, and a conical worm wheel 42 meshed with the conical worm 41 is installed in the cutting part 2. The bevel worm 41 rotates, and the bevel worm wheel 42 rotates along with the rotation, so that the output torque of the driving mechanism 3 is reversed. The transmission speed change between the transmission mechanism 4 and the gear transmission assembly 6 is realized by the planetary gear speed reducing mechanism 9, the rotating speed of the pipe cutter 5 is reduced, and the cutting torque is improved.

Meanwhile, the planetary gear speed reducing mechanism 9 comprises a gear ring 91 which is installed inside the cutting part 2 and is opposite to the bevel gear 42, the center of the bevel gear 42 is fixedly connected with a sun gear 93 through a driving rotating shaft 92, the sun gear 93 is in meshing transmission with the inner side of the gear ring 91 through a plurality of opposite and centrosymmetric planetary gears 94, one side, opposite to the bevel gear 42, of the gear ring 91 is sealed by a limiting disc, the other side of the gear ring is provided with a linkage disc 95 which is rotatably connected with the planetary gears 94, and a driven rotating shaft 96 are fixedly connected with the center of the linkage disc 95 and are connected with the gear transmission assembly 6. The torque of the sun gear 93 is transmitted to the planet gears 94, and then the linkage disk 95 is driven to rotate, so that the rotating speed is further reduced, and the transmission torque of the gear transmission assembly 6 is improved.

Visibly, a first rotating bearing 43 is arranged between the bevel worm wheel 42 and the cutting part 2, a second rotating bearing 44 is arranged between the driven rotating shaft 96 and the cutting part 2, a first bearing groove 45 for inserting the first rotating bearing 43 and a second rotating groove 46 for inserting the second rotating bearing 44 are arranged on the inner side of the cutting part 2, an installation cavity 47 for clamping the gear ring 91 is arranged in the cutting part 2, a plurality of installation grooves 48 and installation bulges 49 which correspond one to one are arranged between the connection positions of the installation cavity 47 and the gear ring 91, and the gear ring 91 is circumferentially positioned relative to the installation cavity 47 through the installation grooves 48 and the installation bulges 49 which are mutually inserted. The first rotating bearing 43 and the second rotating bearing 44 ensure the rotating smoothness of the bevel worm wheel 42 and the linkage disc 95, reduce the transmission friction of the planetary gear speed reducing mechanism 9, and the inner installation cavity 47 is used for installing the gear ring 91 and providing a rotating space for the bevel worm wheel 42.

Obviously, the gear transmission assembly 6 includes a driving gear 61 fixed on a driven rotating shaft 96, the pipe cutting knife 5 has an engaging portion 62 rotating relative to the cutting portion 2, one side of the engaging portion 62 opposite to the driving gear 61 is provided with rotating teeth 63 circumferentially distributed relative to the rotating center of the engaging portion 62, the driving gear 61 and the rotating teeth 63 are engaged with each other, the rotating center of the pipe cutting knife 5 is provided with a rotating hole 65 for a rotating bolt 64 to pass through, a rotating sleeve 66 is sleeved between the rotating bolt 64 and the rotating hole 65, a third rotating bearing 67 is arranged between the rotating sleeve 66 and the cutting portion 2, the inner side of the cutting portion 2 is provided with a third bearing groove 68 for the third rotating bearing 67 to insert, the rotating bolt 64 is connected with a rotating nut 69 and is fixed relative to the cutting portion 2, the outer side of the cutting portion 2 is provided with an assembling port 21 for the rotating nut 69 and the rotating bolt 64 to be fixedly inserted, one side of the pipe cutting knife 5 away from the positioning block is provided with a positioning sheet 22, a positioning frame 23 clamped with the positioning sheet 22 is arranged on the inner side of the cutting part 2. The rotating sleeve 66 is connected between the pipe cutter 5 and the rotating bolt 64 to ensure the stable rotation of the pipe cutter 5, and the positioning piece 22 on the side surface limits the axial position of the pipe cutter 5 relative to the rotating bolt 64.

Preferably, the portion 1 of gripping is formed by the amalgamation of a pair of casing 11 of gripping, and the portion 1 of gripping has hand protector 12, and cutting portion 2 is formed by the amalgamation of a pair of cutting casing 24, and cutting portion 2 has curved clamping part 25, and it sets up between clamping part 25 and pipe cutter 5 to keep silent 7, clamping part 25 has the arc wall 26 that supplies pipe cutter 5 to penetrate, and pipe cutter 5 one side back to keeping silent 7 is provided with the spacing breach 51 that leans on with cutting portion 2 when rotating, through splicing mechanism 13 interconnect between the portion 1 of gripping and the cutting portion 2, and splicing mechanism 13 is including setting up the interface 14 of piecing together in the relative one end of portion 1 and clamping part 25, and clamping part 25 has the concatenation portion 15 with piecing together interface 14 fixed connection, and the inboard laminating in the concatenation portion 15 outside of piecing together interface 14 compresses tightly. The hand guard 12 of the holding part 1 is convenient to hold, the clamping part 25 is used for being clamped with a pipe fitting, the pipe fitting rolls when the pipe fitting is prevented from being cut, and the arc-shaped groove 26 is used for the pipe cutting knife 5 to rotate.

In summary, the principle of the present embodiment is: the operator holds portion 1 by hand, starts actuating mechanism 3, and the inside drive mechanism 4 of cutting portion 2 reduces output speed and has improved the moment of torsion through worm gear drive mode with torque transmission to planetary gear reduction mechanism 9 in, provides great rotation moment of torsion for gear drive subassembly 6, guarantees that pipe cutter 5 has great cutting force.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Although the grip portion 1, the grip housing 11, the hand guard 12, the splicing mechanism 13, the splicing port 14, the splicing portion 15, the cutting portion 2, the assembly port 21, the positioning piece 22, the positioning frame 23, the cutting housing 24, the clamping portion 25, the arc-shaped groove 26, the driving mechanism 3, the driving motor 31, the power supply assembly 32, the control assembly 33, the battery case 34, the control circuit board 35, the power switch 36, the motor switch 37, the transmission mechanism 4, the bevel worm 41, the bevel worm wheel 42, the first rotating bearing 43, the second rotating bearing 44, the first bearing groove 45, the second rotating groove 46, the mounting cavity 47, the mounting groove 48, the mounting protrusion 49, the pipe cutter 5, the limit notch 51, the gear transmission assembly 6, the driving gear 61, the meshing portion 62, the rotating teeth 63, the rotating bolt 64, the rotating hole 65, the rotating sleeve 66, the third rotating bearing 67, the third bearing groove 68, the rotating nut 69, the rotating sleeve 66, the gear box cover, the gear box, and the like are more widely used herein, The terms of the jaw 7, the detachable component 8, the power supply seat 81, the socket 82, the main housing 83, the auxiliary housing 84, the limit groove 85, the limit protrusion 86, the snap tab 87, the snap groove 88, the snap 89, the planetary gear reduction mechanism 9, the gear ring 91, the driving rotating shaft 92, the sun gear 93, the planetary gear 94, the linkage disk 95, the driven rotating shaft 96, etc., but do not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims (10)

1. The utility model provides an electrodynamic type pipe cutter, includes portion of gripping (1) and cutting portion (2), its characterized in that, portion of gripping (1) in be provided with actuating mechanism (3), actuating mechanism (3) output be connected with drive mechanism (4) of setting in cutting portion (2), cutting portion (2) in install and cut tub sword (5), tub sword (5) through gear drive subassembly (6) and drive mechanism (4) linkage and relative cutting portion (2) rotation, tub sword (5) and cutting portion (2) between form and be used for cutting the vice jaw (7) of pipe fitting, actuating mechanism (3) including installing driving motor (31) in portion of gripping (1), portion of gripping (1) lower extreme install power supply unit (32) of being connected with driving motor (31), driving motor (31) be connected with control assembly (33) with power supply unit (32), a planetary gear speed reducing mechanism (9) is arranged between the transmission mechanism (4) and the gear transmission assembly (6).

2. The electric tube cutter as claimed in claim 1, wherein the power supply assembly (32) comprises a battery box (34) mounted at the lower end of the holding portion (1) through a detachable assembly (8), a control circuit board (35) connected to the battery box (34) is mounted in the holding portion (1), the control circuit board (35) is connected to the driving motor (31), and a power switch (36) and a motor switch (37) connected to the control circuit board (35) are disposed outside the holding portion (1).

3. The electric pipe cutter according to claim 2, wherein the detachable assembly (8) comprises a power supply seat (81) vertically or obliquely arranged at the lower end of the holding part (1), the power supply seat (81) is provided with a socket (82) for inserting the battery box body (34), the battery box body (34) comprises a main housing (83) and an auxiliary cover body (84) for closing the port of the main housing (83), a limiting groove (85) and a limiting protrusion (86) are arranged between the outer side of the bottom of the main housing (83) and the bottom of the socket (82), the two sides of the main housing (83) are provided with elastic clamping pieces (87), and a clamping groove (88) and a clamping buckle (89) which are clamped with each other are arranged between the outer side of the clamping piece (87) and the inner side of the socket (82).

4. The electric pipe cutter according to claim 1, wherein the transmission mechanism (4) is a worm and worm gear meshing transmission, the transmission mechanism (4) comprises a conical worm (41) connected to the output end of the driving mechanism (3), and a conical worm gear (42) meshed with the conical worm (41) is installed in the cutting part (2).

5. The electrodynamic pipe cutter according to claim 4, wherein the planetary gear reduction mechanism (9) includes a gear ring (91) installed inside the cutting part (2) and opposite to the bevel gear wheel (42), the center of the bevel gear wheel (42) is fixedly connected with a sun gear (93) through a driving rotating shaft (92), the sun gear (93) is in inside meshing transmission with the gear ring (91) through a plurality of opposite and centrosymmetric planetary gears (94), one side of the gear ring (91) opposite to the bevel gear wheel (42) is sealed by a limiting disc, the other side of the gear ring (91) opposite to the bevel gear wheel (42) is provided with a linkage disc (95) rotatably connected with the planetary gears (94), the center of the linkage disc (95) is fixedly connected with a driven rotating shaft (96), and the driven rotating shaft (96) is connected with the gear transmission assembly (6).

6. The electric pipe cutter according to claim 5, wherein a first rotary bearing (43) is arranged between the bevel worm gear (42) and the cutting part (2), a second rotating bearing (44) is arranged between the driven rotating shaft (96) and the cutting part (2), a first bearing groove (45) for inserting the first rotating bearing (43) and a second rotating groove (46) for inserting the second rotating bearing (44) are arranged on the inner side of the cutting part (2), the cutting part (2) is internally provided with an installation cavity (47) for clamping the gear ring (91), a plurality of mounting grooves (48) and mounting bulges (49) which are in one-to-one correspondence are arranged between the connecting parts of the mounting cavity (47) and the gear ring (91), the gear ring (91) is circumferentially positioned relative to the mounting cavity (47) through the mounting groove (48) and the mounting protrusion (49) which are mutually inserted.

7. The electric pipe cutter according to claim 5, wherein the gear assembly (6) comprises a driving gear (61) fixed on the driven shaft (96), the pipe cutter (5) has a meshing part (62) rotating relative to the cutting part (2), one side of the meshing part (62) opposite to the driving gear (61) is provided with rotating teeth (63) circumferentially distributed relative to the rotating center of the meshing part (62), and the driving gear (61) and the rotating teeth (63) are meshed with each other.

8. The electric pipe cutter according to claim 7, wherein a rotation hole (65) for a rotation bolt (64) to pass through is formed in a rotation center of the pipe cutter (5), a rotation sleeve (66) is sleeved between the rotation bolt (64) and the rotation hole (65), a third rotation bearing (67) is arranged between the rotation sleeve (66) and the cutting part (2), a third bearing groove (68) for the third rotation bearing (67) to insert is formed in the inner side of the cutting part (2), the rotation bolt (64) is connected with a rotation nut (69) and is relatively fixed with the cutting part (2), an assembly hole (21) for the rotation nut (69) and the rotation bolt (64) to be inserted and fixed is formed in the outer side of the cutting part (2), and a positioning piece (22) is arranged on one side of the pipe cutter (5) far away from a positioning block, the inner side of the cutting part (2) is provided with a positioning frame (23) which is clamped with the positioning sheet (22).

9. The electrodynamic pipe cutter according to claim 1, wherein the grip portion (1) is formed by splicing a pair of grip housings (11), the grip portion (1) has a hand guard (12), the cutting portion (2) is formed by splicing a pair of cutting housings (24), the cutting portion (2) has an arc-shaped clamping portion (25), the jaw (7) is disposed between the clamping portion (25) and the pipe cutter (5), the clamping portion (25) has an arc-shaped slot (26) for the pipe cutter (5) to penetrate, one side of the pipe cutter (5) opposite to the jaw (7) is provided with a limit notch (51) abutted against the cutting portion (2) during rotation, and the grip portion (1) and the cutting portion (2) are connected to each other through a splicing mechanism (13).

10. The electric pipe cutter as claimed in claim 9, wherein the splicing mechanism (13) comprises a splicing opening (14) disposed at an end of the holding portion (1) opposite to the holding portion (25), the holding portion (25) has a splicing portion (15) fixedly connected to the splicing opening (14), and an inner side of the splicing opening (14) is attached to and pressed against an outer side of the splicing portion (15).

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