Handheld threading machine

Abstract

The invention provides a handheld threading machine, and relates to the technical field of threading machines. The handheld threading machine comprises a shell, a fluted disc, a hinge plate body and an unlocking disc, the fluted disc is rotatably arranged in the shell, the hinge plate body is arranged in the fluted disc in a penetrating mode, a plurality of grooves are formed in the hinge plate body in the circumferential direction of the hinge plate body at intervals, a torque transmission rod is movably arranged on the fluted disc, the torque transmission rod is used for being matched with any groove, and the unlocking disc is used for unlocking the fluted disc. The unlocking disc is rotatably arranged on the fluted disc, an eccentric groove is formed in the unlocking disc, the torque transmission rod is matched with the eccentric groove, and in the rotating process of the unlocking disc, the torque transmission rod is matched with or unmatched with the groove, so that the mounting and dismounting processes of the hinge plate body can be effectively simplified.

Description

Technical Field

[0001] The present application relates to the technical field of threading machines, and in particular to a handheld threading machine. Background Art

[0002] A pipe threading machine is an electric tool used to process external threads of pipe fittings. It is also called an electric pipe threading machine, an electric pipe cutting and threading machine, a wire twisting machine or a pipe threading machine. It works through a forward and reverse device, and is designed to electrify the manual pipe thread twisting plate, making pipe threading during pipe installation easier and faster, and reducing the labor intensity of pipe installation workers.

[0003] Existing handheld threading machines generally have a hinge plate body installed on a shell, and a tool installed on the hinge plate body. During the thread processing process, the rotation of the hinge plate body drives the tool to rotate to complete the thread processing. However, the current installation and disassembly process of the hinge plate body is relatively cumbersome, which makes it inconvenient to maintain or replace the hinge plate body. Summary of the invention

[0004] The purpose of the present application includes, for example, providing a handheld threading machine that can effectively simplify the installation and disassembly process of the hinge plate body.

[0005] The embodiments of the present application can be implemented as follows:

[0006] An embodiment of the present application provides a handheld threading machine, which includes a shell, a toothed disc, a hinge plate body and an unlocking disc, wherein the toothed disc is rotatably arranged in the shell, the hinge plate body is inserted in the toothed disc, and a plurality of grooves are arranged on the hinge plate body at intervals along its circumference, and a torque transmission rod is movably arranged on the toothed disc, and the torque transmission rod is used to cooperate with any one of the grooves, and the unlocking disc is rotatably arranged on the toothed disc, and an eccentric groove is arranged on the unlocking disc, and the torque transmission rod cooperates with the eccentric groove. During the rotation of the unlocking disc, the torque transmission rod cooperates with or releases the groove.

[0007] Optionally, a transfer rod groove is opened on the toothed disc along its radial direction, and the torque transfer rod can be movably arranged in the transfer rod groove. A guide groove connected with the transfer rod groove is opened on the toothed disc along its axial direction, and a pin is arranged on the torque transfer rod, and the pin passes through the guide groove and cooperates with the eccentric groove.

[0008] Optionally, the torque transmission rod is provided with a rod head, and the rod head is used to cooperate with any one of the grooves, and the draft angles of the rod head and the groove are both 2-4°.

[0009] Optionally, a receiving groove is provided on the toothed disk, a boss is provided on the unlocking disk, the boss extends into the receiving groove, a compression spring is also provided in the receiving groove, one end of the compression spring is fixed to the inner wall of the receiving groove, and the other end of the compression spring abuts against the boss.

[0010] Optionally, the handheld threading machine further comprises a positioning disk, a limiting groove is provided on the unlocking disk, a first fastener is arranged on the positioning disk, and the first fastener passes through the limiting groove and is connected to the toothed disk.

[0011] Optionally, the handheld threading machine further includes an oil supply mechanism, which includes a rotor pump, a tee pipe, a first pipeline, a second pipeline and a hose, a driving member and a multi-stage gear are arranged in the housing, the driving member is transmission-connected to the first-stage gear, the pump shaft of the rotor pump is coaxially connected to one of the first-stage gears, and the toothed disc is transmission-connected to the last-stage gear;

[0012] The rotor pump is provided with a first liquid inlet and a second liquid inlet and outlet, the first liquid inlet and outlet are connected to the first pipeline, the second liquid inlet and outlet are connected to the first end of the three-way pipe, the second end of the three-way pipe is connected to the second pipeline, the third end of the three-way pipe is connected to the hose, a first one-way valve is arranged between the three-way pipe and the second pipeline, a second one-way valve is arranged between the three-way pipe and the hose, the first pipeline and the second pipeline are both used to be connected to an external oil tank, and the end of the hose away from the three-way pipe is used to face the pipe fitting.

[0013] Optionally, a mounting groove is provided on the surface of the rotor pump facing the gear, and a through hole connected to the mounting groove is also provided on the surface of the rotor pump facing the gear. A second fastener is provided on the shell, and the second fastener is used to extend into the mounting groove through the through hole and be clamped in the mounting groove.

[0014] Optionally, a wedge-shaped surface is provided in the installation groove, and during the rotation of the rotor pump relative to the housing, the second fastener can be clamped in the installation groove through the wedge-shaped surface.

[0015] Optionally, the driving member is a driving motor, one end of the driving motor is coaxially connected to a first bevel gear, the first-stage gear includes a second bevel gear, and the first bevel gear is meshed with the second bevel gear.

[0016] Optionally, each stage of the gears is provided with a gear shaft, one of the gear shafts is provided with a rectangular groove, and the pump shaft of the rotor pump is plugged into and fits with the rectangular groove.

[0017] The beneficial effects of the handheld threading machine provided by the embodiment of the present application include, for example: in order to effectively simplify the installation and disassembly process of the hinge plate body, a handheld threading machine is designed, which includes a shell, a toothed disc, a hinge plate body and an unlocking disc, the toothed disc is rotatably arranged in the shell, the hinge plate body is inserted in the toothed disc, and a plurality of grooves are arranged at intervals along the circumference of the hinge plate body, a torque transmission rod is movably arranged on the toothed disc, the torque transmission rod is used to cooperate with any one of the grooves, the unlocking disc is rotatably arranged on the toothed disc, an eccentric groove is provided on the unlocking disc, the torque transmission rod cooperates with the eccentric groove, and during the rotation of the unlocking disc, the torque transmission rod cooperates with or releases the groove. During the installation of the hinge plate body, the hinge plate body is inserted into the toothed disc. Since the torque transmission rod cooperates with the eccentric groove, the unlocking disc rotates forward and drives the torque transmission rod to move until the torque transmission rod cooperates with any one of the grooves, thereby completing the installation of the hinge plate body. During the removal of the hinge plate body, since the torque transmission rod cooperates with the eccentric groove, the unlocking disc rotates in the reverse direction and drives the torque transmission rod to move until the torque transmission rod is disengaged from the groove. At this time, the hinge plate body can be taken out of the toothed disc, which effectively simplifies the installation and disassembly process of the hinge plate body, thereby facilitating the maintenance or replacement of the hinge plate body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of a handheld threading machine in an embodiment of the present application;

[0020] Figure 2 This is a schematic diagram of a first partial explosion structure of a handheld threading machine in an embodiment of the present application;

[0021] Figure 3 This is a schematic diagram of the structure of the toothed disc in the embodiment of the present application;

[0022] Figure 4 This is a schematic diagram of the structure of the hinge plate body in the embodiment of the present application;

[0023] Figure 5 This is a schematic diagram of the structure of the unlocking disk in the embodiment of the present application;

[0024] Figure 6 This is a schematic diagram for illustrating the oil supply mechanism in the embodiment of the present application;

[0025] Figure 7This is a schematic diagram of a second partial explosion structure of a handheld threading machine in an embodiment of the present application;

[0026] Figure 8 This is a schematic diagram of the structure of the rotor pump in the embodiment of the present application;

[0027] Fig. 9 It is a cross-sectional view of the rotor pump in the embodiment of the present application.

[0028] Icons: 100-housing; 110-second fastener; 120-handheld part; 130-button; 140-reversing rod; 200-toothed disc; 210-torque transmission rod; 211-pin shaft; 212-rod head; 220-transmission rod groove; 230-guide groove; 240-accommodation groove; 241-compression spring; 300-hinged plate body; 310-groove; 320-tool; 330-fixing disc; 400-unlocking disc; 41 0-eccentric groove; 420-boss; 430-limiting groove; 440-raised portion; 500-positioning plate; 510-first fastener; 600-oil supply mechanism; 610-rotor pump; 611-mounting groove; 612-perforation; 613-wedge surface; 620-tee pipe; 630-first pipeline; 640-second pipeline; 650-hose; 660-first one-way valve; 670-second one-way valve; 700-oil tank. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, it is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0033] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0034] It should be noted that, in the absence of conflict, the features in the embodiments of the present application may be combined with each other.

[0035] The inventor of the present application has found that the existing handheld threading machine generally has a hinge plate body 300 installed on the housing 100, and a tool 320 installed on the hinge plate body 300. During the thread processing, the hinge plate body 300 rotates to drive the tool 320 to rotate and complete the thread processing. However, the installation and disassembly process of the hinge plate body 300 is relatively cumbersome, which makes it inconvenient to maintain or replace the hinge plate body 300. The embodiment of the present application provides a handheld threading machine, which is at least used to solve this technical problem.

[0036] Please refer to Figure 1-Figure 5 The handheld threading machine provided in the embodiment of the present application includes a shell 100, a toothed disc 200, a hinge plate body 300 and an unlocking disc 400. The toothed disc 200 is rotatably arranged in the shell 100, and the hinge plate body 300 is penetrated in the toothed disc 200. A plurality of grooves 310 are arranged on the hinge plate body 300 along its own circumferential interval. A torque transmission rod 210 is movably arranged on the toothed disc 200, and the torque transmission rod 210 is used to cooperate with any one of the grooves 310. The unlocking disc 400 is rotatably arranged on the toothed disc 200, and an eccentric groove 410 is arranged on the unlocking disc 400. The torque transmission rod 210 cooperates with the eccentric groove 410. During the rotation of the unlocking disc 400, the torque transmission rod 210 cooperates with or releases the groove 310.

[0037] A through hole is provided in the middle of the toothed disc 200, and the hinge plate body 300 is inserted into the through hole; the torque transmission rod 210 can move along the radial direction of the toothed disc 200, the unlocking disc 400 and the toothed disc 200 are coaxially arranged, and the unlocking disc 400 and the toothed disc 200 can both rotate around their own axes; the eccentric groove 410 is an arc groove, and the two ends of the eccentric groove 410 are at different distances from the axis of the unlocking disc 400.

[0038] Optionally, two torque transfer rods 210 are movably provided on the toothed disc 200, and the two torque transfer rods 210 are arranged opposite to each other. The two torque transfer rods 210 are respectively used to cooperate with the two grooves 310, so as to improve the stability of the connection between the hinge plate body 300 and the toothed disc 200; correspondingly, two eccentric grooves 410 are relatively provided on the unlocking disc 400, and the two torque transfer rods 210 are respectively cooperated with the two eccentric grooves 410. During the rotation of the unlocking disc 400, the two torque transfer rods 210 cooperate or release the corresponding grooves 310.

[0039] The unlocking plate 400 is rotated in the forward direction to drive the torque transmission rod 210 to move toward the axis of the toothed plate 200, until one end of the torque transmission rod 210 extends into the through hole and cooperates with one of the grooves 310, thereby completing the installation of the hinged plate body 300; during the process of disassembling the hinged plate body 300, the torque transmission rod 210 cooperates with the eccentric groove 410, and the unlocking plate 400 is rotated in the reverse direction to drive the torque transmission rod 210 to move away from the axis of the toothed plate 200, until the torque transmission rod 210 is disengaged from the groove 310, at which time the hinged plate body 300 can be removed from the toothed plate 200, effectively simplifying the installation and disassembly process of the hinged plate body 300, thereby facilitating the maintenance or replacement of the hinged plate body 300.

[0040] In this embodiment, a transfer rod groove 220 is opened on the toothed disc 200 along its radial direction, and the torque transfer rod 210 can be movably arranged in the transfer rod groove 220. A guide groove 230 connected to the transfer rod groove 220 is opened on the toothed disc 200 along its axial direction. A pin shaft 211 is arranged on the torque transfer rod 210, and the pin shaft 211 passes through the guide groove 230 and cooperates with the eccentric groove 410.

[0041] The torque transmission rod 210 extends in the same direction as the transmission rod groove 220. One end of the transmission rod groove 220 is connected to the through hole. The end face of the transmission rod groove 220 is circular. The guide groove 230 is roughly rectangular. The width of the guide groove 230 is smaller than the end face diameter of the transmission rod groove 220. The pin shaft 211 extends along the axial direction of the gear plate 200. The pin shaft 211 passes through the guide groove 230 and cooperates with the eccentric groove 410.

[0042] During the forward rotation of the unlocking disk 400, the pin 211 moves from the end of the eccentric groove 410 away from the axis of the unlocking disk 400 toward the end of the eccentric groove 410 close to the axis of the unlocking disk 400, thereby driving the torque transmission rod 210 to move toward the axis of the toothed disk 200 until one end of the torque transmission rod 210 extends into the through hole and cooperates with one of the grooves 310; during the reverse rotation of the unlocking disk 400, the pin 211 moves from the end of the eccentric groove 410 close to the axis of the unlocking disk 400 toward the end of the eccentric groove 410 away from the axis of the unlocking disk 400, thereby driving the torque transmission rod 210 to move away from the axis of the toothed disk 200 until the torque transmission rod 210 is released from the groove 310.

[0043] On the one hand, during the rotation of the unlocking disk 400, the pin shaft 211 can move in the eccentric groove 410, thereby driving the torque transfer rod 210 to move in the transfer rod groove 220. On the other hand, by allowing the pin shaft 211 to pass through the guide groove 230, the torque transfer rod 210 is not easy to rotate around its own axis, thereby ensuring that the torque transfer rod 210 can cooperate with the groove 310.

[0044] In this embodiment, the torque transmission rod 210 is provided with a rod head 212, the rod head 212 and the groove 310 match in shape, the rod head 212 is used to cooperate with any one of the grooves 310, and the draft angles of the rod head 212 and the groove 310 are both 2-4°.

[0045] The rod head 212 is roughly rectangular, and multiple grooves 310 have the same shape, so that the rod head 212 can cooperate with any groove 310, and the draft angles of the rod head 212 and the groove 310 are the same, both of which are 2-4°, so that the torque transmitted from the torque transfer rod 210 to the hinge plate body 300 is always along the circumferential direction of the hinge plate body 300.

[0046] Exemplarily, the draft angles of the club head 212 and the groove 310 are both 2°, 3° or 4°. It can be understood that the draft angles of the club head 212 and the groove 310 can be selected within the above range according to actual working conditions, as long as the draft angles of the club head 212 and the groove 310 are the same.

[0047] In this embodiment, a receiving groove 240 is provided on the toothed disk 200, and a boss 420 is provided on the unlocking disk 400. The boss 420 extends into the receiving groove 240. A compression spring 241 is also provided in the receiving groove 240. One end of the compression spring 241 is fixed to the inner wall of the receiving groove 240, and the other end of the compression spring 241 is in contact with the boss 420.

[0048] The accommodating groove 240 is also an arc-shaped groove, extending along the circumference of the toothed disc 200, and the boss 420 extends toward one side of the toothed disc 200 and extends into the accommodating groove 240; the surface of the unlocking disc 400 facing away from the toothed disc 200 is provided with multiple protrusions 440 at intervals along the circumference of the unlocking disc 400 for easy hand holding.

[0049] Under the force of the compression spring 241 on the boss 420, the unlocking disk 400 can always rotate forward by itself, thereby driving the torque transmission rod 210 to move toward the axis of the toothed disk 200 until one end of the torque transmission rod 210 extends into the through hole and cooperates with one of the grooves 310, ensuring that the torque transmission rod 210 and the groove 310 cooperate stably; when the hinge plate body 300 needs to be unlocked, the person manually holds the protrusion 440 and rotates the unlocking disk 400 in the opposite direction, and the boss 420 pushes the compression spring 241 to compress, thereby driving the torque transmission rod 210 to move away from the axis of the toothed disk 200 until the torque transmission rod 210 is released from the groove 310, at which time the hinge plate body 300 can be removed from the through hole.

[0050] In this embodiment, the handheld threading machine also includes a positioning disk 500 , a limiting groove 430 is provided on the unlocking disk 400 , a first fastener 510 is provided on the positioning disk 500 , and the first fastener 510 passes through the limiting groove 430 and is connected to the toothed disk 200 .

[0051] The positioning disk 500 is located on the side of the unlocking disk 400 away from the toothed disk 200. The unlocking disk 400 is provided with a plurality of limiting grooves 430. Each limiting groove 430 is an arc-shaped groove and extends along the circumference of the unlocking disk 400. The positioning disk 500 is provided with a plurality of first fasteners 510. The plurality of first fasteners 510 pass through the plurality of limiting grooves 430 one by one and are connected to the toothed disk 200. The first fasteners 510 can be optionally screws.

[0052] By setting a positioning disk 500 on the side of the unlocking disk 400 away from the toothed disk 200, the positioning disk 500 can prevent the unlocking disk 400 from disengaging from the toothed disk 200, and during the rotation of the unlocking disk 400, the first fastener 510 moves in the corresponding limiting groove 430. When the first fastener 510 abuts against any end of the limiting groove 430, the first fastener 510 can prevent the unlocking disk 400 from continuing to rotate, thereby limiting the rotation angle of the unlocking disk 400.

[0053] In addition, the interior of the hinge plate body 300 is used for passing pipe fittings, and a tool 320 for processing threads is provided on the hinge plate body 300. The hinge plate body 300 can process the pipe fittings passing through the hinge plate body 300 during the rotation process; a fixing plate 330 is also provided on one side of the hinge plate body 300, and the fixing plate 330 is connected to the hinge plate body 300 by bolts, so as to fix the tool 320 on the hinge plate body 300.

[0054] Please refer to Figure 6-Figure 9 In this embodiment, the handheld threading machine also includes an oil supply mechanism 600, which includes a rotor pump 610, a three-way pipe 620, a first pipeline 630, a second pipeline 640 and a hose 650. A driving member and a multi-stage gear are arranged in the housing 100. The driving member is connected to the first-stage gear in a transmission manner. The pump shaft of the rotor pump 610 is coaxially connected to one of the first-stage gears, and the toothed disc 200 is connected to the last-stage gear in a transmission manner. The rotor pump 610 is provided with a first liquid inlet and a second liquid inlet and a second liquid inlet. The first liquid inlet and a second liquid inlet are connected to the first pipeline 630. 0 is connected, the second liquid inlet and outlet are connected to the first end of the three-way pipe 620, the second end of the three-way pipe 620 is connected to the second pipeline 640, the third end of the three-way pipe 620 is connected to the hose 650, a first one-way valve 660 is arranged between the three-way pipe 620 and the second pipeline 640, a second one-way valve 670 is arranged between the three-way pipe 620 and the hose 650, the first pipeline 630 and the second pipeline 640 are both used to be connected to the external oil tank 700, and the end of the hose 650 away from the three-way pipe 620 is used to face the pipe fitting.

[0055] One end of the first pipeline 630 is connected to the first liquid inlet and outlet, the other end of the first pipeline 630 is connected to the external oil tank 700, one end of the second pipeline 640 is connected to the second end of the three-way pipe 620, and the other end of the second pipeline 640 is connected to the external oil tank 700, wherein a multi-layer filter is provided in the oil tank 700, and optionally, the pump shaft of the rotor pump 610 is coaxially connected to the second-stage gear.

[0056] During the feeding process of the threading machine, the second-stage gear drives the pump shaft of the rotor pump 610 to rotate in the forward direction, so that the inner and outer rotors of the rotor pump 610 rotate clockwise, and a negative pressure is formed at the first inlet and outlet. Under the action of the negative pressure, the oil in the external oil tank 700 is pumped to the first inlet and outlet. At this time, the first one-way valve 660 is blocked, and the oil can only be sprayed onto the surface of the pipe fitting through the second one-way valve 670 and the hose 650, which plays a role in cooling and lubricating the pipe fitting processing. The oil falling on the pipe fitting will fall into the oil tank 700, thereby realizing the recycling of the oil.

[0057] During the process of retracting the threading machine, the second-stage gear drives the pump shaft of the rotor pump 610 to rotate in the opposite direction, so that the inner and outer rotors of the rotor pump 610 rotate counterclockwise, and negative pressure is formed at the second inlet and outlet. Under the action of the negative pressure, the oil in the oil tank 700 enters the second inlet and outlet through the first one-way valve 660 and the first end of the three-way pipe 620 in turn, and then flows back to the oil tank 700 from the first inlet and outlet through the first pipeline 630, thereby realizing the internal circulation of the oil.

[0058] In this embodiment, a mounting groove 611 is provided on the surface of the rotor pump 610 facing the gear, and a through hole 612 connected to the mounting groove 611 is also provided on the surface of the rotor pump 610 facing the gear. A second fastener 110 is provided on the housing 100, and the second fastener 110 is used to extend into the mounting groove 611 through the through hole 612 and be clamped in the mounting groove 611.

[0059] The mounting groove 611 is also an arc-shaped groove, extending along the circumference of the rotor pump 610. The second fastener 110 can be optionally a bolt, and the head of the bolt can extend into the mounting groove 611 through the through hole 612. Then, the rotor pump 610 is rotated relative to the housing 100, and the head of the bolt can be clamped in the mounting groove 611.

[0060] In this embodiment, a wedge-shaped surface 613 is provided in the installation groove 611 , and when the rotor pump 610 rotates relative to the housing 100 , the second fastener 110 can be clamped in the installation groove 611 through the wedge-shaped surface 613 .

[0061] The wedge surface 613 is inclined relative to the surface of the rotor pump 610 facing the gear. When the rotor pump 610 rotates relative to the housing 100, the head of the bolt and the wedge surface 613 are pressed against each other, so that the head of the bolt is clamped in the installation groove 611, and the rotor pump 610 is relatively fixed to the housing 100.

[0062] Optionally, two mounting grooves 611 are provided on the surface of the rotor pump 610 facing the gear, and two second fasteners 110 are provided on the housing 100. The two second fasteners 110 are arranged opposite to each other, and the two second fasteners 110 respectively extend into the mounting grooves 611 through corresponding through holes 612 and are clamped in the mounting grooves 611, so that the connection between the rotor pump 610 and the housing 100 is more stable.

[0063] In this embodiment, the driving member is a driving motor, one end of the driving motor is coaxially connected to the first bevel gear, the first-stage gear includes a second bevel gear, and the first bevel gear is meshed with the second bevel gear.

[0064] By setting a first bevel gear at one end of the driving motor and making the first bevel gear mesh with the second bevel gear, when the driving motor is started, the driving motor can drive the second bevel gear to rotate through the first bevel gear, thereby driving the subsequent multi-stage gears and the toothed disc 200 to rotate synchronously.

[0065] In this embodiment, each gear stage is provided with a gear shaft, and the gear shafts on each gear stage are parallel to each other. A rectangular groove is opened on one of the gear shafts, and the pump shaft of the rotor pump 610 is plugged into the rectangular groove.

[0066] Exemplarily, a rectangular groove is provided on the gear shaft of the second-stage gear, and the pump shaft of the rotor pump 610 matches the shape of the rectangular groove at one end of the gear shaft. When the pump shaft of the rotor pump 610 is plugged into the rectangular groove, the gear shaft can drive the pump shaft of the rotor pump 610 to rotate synchronously.

[0067] The shell 100 is also provided with a hand-held portion 120, and a button 130 and a reversing rod 140 are provided on the shell 100 near the hand-held portion 120. The drive motor can be started by pressing the button 130, and the direction of the drive shaft of the drive motor can be switched by pressing the reversing rod 140 on opposite sides. The starting of the drive motor and the switching of the direction can be achieved through a specific circuit, which will not be elaborated herein.

[0068] The working principle of the handheld threading machine provided in the embodiment of the present application at least includes:

[0069] The process of disassembling and assembling the hinge plate body 300: During the process of installing the hinge plate body 300, the hinge plate body 300 is inserted into the through hole of the toothed disc 200. Since the pin shaft 211 arranged on the torque transmission rod 210 cooperates with the eccentric groove 410, the compression spring 241 drives the unlocking disc 400 to rotate forward, thereby driving the torque transmission rod 210 to move toward the axis of the toothed disc 200, until one end of the torque transmission rod 210 extends into the through hole and cooperates with one of the grooves 310, completing the installation of the hinge plate body 300. ; During the process of disassembling the hinge plate body 300, since the pin shaft 211 set on the torque transmission rod 210 cooperates with the eccentric groove 410, the unlocking plate 400 is manually rotated in the opposite direction to drive the torque transmission rod 210 to move away from the axis of the toothed plate 200 until the torque transmission rod 210 is disengaged from the groove 310. At this time, the hinge plate body 300 can be taken out from the through hole of the toothed plate 200, which effectively simplifies the installation and disassembly process of the hinge plate body 300, thereby facilitating the maintenance or replacement of the hinge plate body 300.

[0070] The process of advancing and retracting the threading machine: During the process of advancing the threading machine, the reversing rod 140 is pressed to one side, and then the button 130 is continuously pressed to make the driving motor rotate forward, and the hinge plate body 300 will rotate forward with the toothed disc 200. At this time, the handheld part 120 is held to move the threading machine along the length direction of the pipe fitting. When the cutter 320 cuts into the pipe fitting for about two circles, the button 130 is tightened to ensure the threading operation. When the threading machine moves to the point where the end face of the cutter 320 is flush with the end face of the pipe fitting, the threading will stop when the button 130 is released. The motor will also drive the gear coaxially connected to the pump shaft to drive the pump shaft of the rotor pump 610 to rotate in the forward direction, so that the inner and outer rotors of the rotor pump 610 rotate clockwise, and a negative pressure will be formed at the first inlet and outlet. Under the action of the negative pressure, the oil in the external oil tank 700 is pumped to the first inlet and outlet. At this time, the first one-way valve 660 is blocked, and the oil is sprayed onto the surface of the pipe fittings through the second one-way valve 670 and the hose 650, which cools and lubricates the pipe fittings. The oil falling on the pipe fittings will fall into the oil tank 700, thereby realizing the recycling of the oil.

[0071] During the process of retracting the threading machine, the reversing rod 140 is pressed to the other side, and then the button 130 is continuously pressed to reverse the driving motor, and the hinge plate body 300 will rotate in the opposite direction with the toothed disc 200 until the tool 320 is separated from the pipe fitting. At this time, the button 130 is released and the threading work is completed; during the process of retracting the tool, the driving motor will also drive the gear coaxially connected to the pump shaft to drive the pump shaft of the rotor pump 610 to rotate in the opposite direction, so that the inner and outer rotors of the rotor pump 610 rotate counterclockwise, and negative pressure is formed at the second inlet and outlet. Under the action of the negative pressure, the oil in the oil tank 700 enters the second inlet and outlet through the first one-way valve 660 and the first end of the three-way pipe 620 in turn, and then flows back to the oil tank 700 from the first inlet and outlet through the first pipeline 630, thereby realizing the internal circulation of the oil, and there is always oil at the first inlet and outlet and the second inlet and outlet of the rotor pump 610, which can ensure that the oil can be sprayed out in time during the next threading work.

[0072] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A handheld threading machine, characterized in that: The invention comprises a housing (100), a toothed disc (200), a hinge plate body (300) and an unlocking disc (400), wherein the toothed disc (200) is rotatably arranged in the housing (100), the hinge plate body (300) is inserted into the toothed disc (200), a plurality of grooves (310) are arranged on the hinge plate body (300) along its own circumferential direction, a torque transmission rod (210) is movably arranged on the toothed disc (200), the torque transmission rod (210) is used to cooperate with any one of the grooves (310), the unlocking disc (400) is rotatably arranged on the toothed disc (200), an eccentric groove (410) is arranged on the unlocking disc (400), the torque transmission rod (210) cooperates with the eccentric groove (410), and during the rotation of the unlocking disc (400), the torque transmission rod (210) cooperates with or releases the groove (310).

2. The handheld threading machine according to claim 1, characterized in that: The toothed disc (200) is provided with a transmission rod groove (220) along its radial direction, the torque transmission rod (210) is movably arranged in the transmission rod groove (220), the toothed disc (200) is provided with a guide groove (230) connected to the transmission rod groove (220) along its axial direction, the torque transmission rod (210) is provided with a pin shaft (211), the pin shaft (211) passes through the guide groove (230) and cooperates with the eccentric groove (410).

3. The handheld threading machine according to claim 1, characterized in that: The torque transmission rod (210) is provided with a rod head (212), and the rod head (212) is used to cooperate with any one of the grooves (310), and the draft angles of the rod head (212) and the groove (310) are both 2-4 degrees.

4. The handheld threading machine according to claim 1, characterized in that: The toothed disc (200) is provided with a receiving groove (240), the unlocking disc (400) is provided with a boss (420), the boss (420) extends into the receiving groove (240), a compression spring (241) is further provided in the receiving groove (240), one end of the compression spring (241) is fixed to the inner wall of the receiving groove (240), and the other end of the compression spring (241) is in contact with the boss (420).

5. The handheld threading machine according to claim 1, characterized in that: The handheld threading machine also includes a positioning disk (500), a limiting groove (430) is provided on the unlocking disk (400), and a first fastener (510) is provided on the positioning disk (500), and the first fastener (510) passes through the limiting groove (430) and is connected to the toothed disk (200).

6. The handheld threading machine according to claim 1, characterized in that: The handheld threading machine further comprises an oil supply mechanism (600), the oil supply mechanism (600) comprising a rotor pump (610), a three-way pipe (620), a first pipeline (630), a second pipeline (640) and a hose (650); a driving member and a multi-stage gear are arranged in the housing (100); the driving member is transmission-connected to the first-stage gear; the pump shaft of the rotor pump (610) is coaxially connected to one of the first-stage gears; and the toothed disc (200) is transmission-connected to the last-stage gear; The rotor pump (610) is provided with a first liquid inlet and a second liquid inlet and a second liquid inlet, the first liquid inlet and the second liquid inlet are connected to the first pipeline (630), the second liquid inlet and the second liquid inlet are connected to the first end of the three-way pipe (620), the second end of the three-way pipe (620) is connected to the second pipeline (640), the third end of the three-way pipe (620) is connected to the hose (650), a first one-way valve (660) is provided between the three-way pipe (620) and the second pipeline (640), a second one-way valve (670) is provided between the three-way pipe (620) and the hose (650), the first pipeline (630) and the second pipeline (640) are both used to be connected to an external oil tank (700), and one end of the hose (650) away from the three-way pipe (620) is used to face the pipe fitting.

7. The handheld threading machine according to claim 6, characterized in that: The rotor pump (610) is provided with a mounting groove (611) on the surface facing the gear, and the rotor pump (610) is also provided with a through hole (612) connected to the mounting groove (611) on the surface facing the gear. The housing (100) is provided with a second fastener (110), and the second fastener (110) is used to extend into the mounting groove (611) through the through hole (612) and be clamped in the mounting groove (611).

8. The handheld threading machine according to claim 7, characterized in that: A wedge-shaped surface (613) is provided in the installation groove (611), and when the rotor pump (610) rotates relative to the housing (100), the second fastener (110) can be clamped in the installation groove (611) through the wedge-shaped surface (613).

9. The handheld threading machine according to claim 6, characterized in that: The driving member is a driving motor, one end of which is coaxially connected to a first bevel gear, the first-stage gear includes a second bevel gear, and the first bevel gear is meshed with the second bevel gear.

10. The handheld threading machine according to claim 6, characterized in that: Each stage of the gear is provided with a gear shaft, one of the gear shafts is provided with a rectangular groove, and the pump shaft of the rotor pump (610) is plugged into and matched with the rectangular groove.

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