A hand-held threading machine

Abstract

The application provides a handheld threading machine, and relates to the technical field of threading machines.The handheld threading machine comprises a shell, a gear disc, a hinged plate body and an unlocking disc, the gear disc is rotatably arranged in the shell, the hinged plate body is arranged in the gear disc, a plurality of grooves are arranged on the hinged plate body along the circumferential direction of the hinged plate body, a torque transmission rod is movably arranged on the gear disc, the torque transmission rod is used for cooperating with any one groove, the unlocking disc is rotatably arranged on the gear disc, an eccentric groove is arranged on the unlocking disc, the torque transmission rod cooperates with the eccentric groove, and the torque transmission rod cooperates with or releases cooperation with the groove in the process of rotating the unlocking disc, so that the installation and dismounting process of the hinged plate body can be effectively simplified.

Description

Technical Field

[0001] This application relates to the field of threading machine technology, and more specifically, to a handheld threading machine. Background Technology

[0002] A threading machine is a power tool used to process external threads on pipe fittings. It is also known as an electric threading machine, electric pipe cutting and threading machine, thread winch, or pipe threading machine. It operates through a forward and reverse mechanism, designed to energize manual pipe thread winches, thereby making pipe threading during pipe installation easier and faster, and reducing the labor intensity of pipe installers.

[0003] Existing handheld threading machines typically have a hinge plate mounted on the housing, with a cutting tool mounted on the hinge plate. During thread processing, the rotation of the hinge plate drives the cutting tool to rotate, thus completing the thread processing. However, the current installation and disassembly process of the hinge plate is quite cumbersome, making it inconvenient to maintain or replace the hinge plate. Summary of the Invention

[0004] The purpose of this 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 this application can be implemented as follows:

[0006] An embodiment of this application provides a handheld threading machine, which includes a housing, a gear disc, a hinge plate, and an unlocking disc. The gear disc is rotatably disposed within the housing, and the hinge plate passes through the gear disc. The hinge plate has multiple grooves spaced apart along its circumference. A torque transmission rod is movably disposed on the gear disc, and the torque transmission rod is used to engage with any one of the grooves. The unlocking disc is rotatably disposed on the gear disc, and the unlocking disc has an eccentric groove. The torque transmission rod engages with the eccentric groove. During the rotation of the unlocking disc, the torque transmission rod engages with or disengages from the groove.

[0007] Optionally, the gear disk has a transmission rod groove along its radial direction, and the torque transmission rod is movably disposed in the transmission rod groove. The gear disk has a guide groove along its axial direction that communicates with the transmission rod groove. The torque transmission rod is provided with a pin, which passes through the guide groove and cooperates with the eccentric groove.

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

[0009] Optionally, the gear plate has a receiving groove, the unlocking plate has a boss, the boss extends into the receiving groove, and 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 includes a positioning plate, an unlocking plate with a limiting groove, and a first fastener on the positioning plate, which passes through the limiting groove and is connected to the gear plate.

[0011] Optionally, the handheld threading machine further includes an oil supply mechanism, which includes a rotor pump, a three-way pipe, a first pipeline, a second pipeline, and a hose. The housing is equipped with a drive component and a multi-stage gear. The drive component is connected to the first-stage gear. The pump shaft of the rotor pump is coaxially connected to one of the first-stage gears. The gear disc is connected to the last-stage gear.

[0012] The rotor pump is provided with a first inlet / outlet and a second inlet / outlet. The first inlet / outlet is connected to the first pipeline, and the second inlet / outlet is connected to the first end of the three-way pipe. The second end of the three-way pipe is connected to the second pipeline, and the third end of the three-way pipe is connected to the hose. A first check valve is provided between the three-way pipe and the second pipeline, and a second check valve is provided between the three-way pipe and the hose. Both the first pipeline and the second pipeline are used to connect to an external oil tank, and the end of the hose away from the three-way pipe is directed toward the fitting.

[0013] Optionally, the rotor pump has a mounting groove on its surface facing the gear, and the rotor pump also has a through hole on its surface facing the gear that communicates with the mounting groove. A second fastener is provided on the housing, which is used to extend through the through hole and be held in the mounting groove.

[0014] Optionally, a wedge-shaped surface is provided in the mounting groove, so that the second fastener can be held in the mounting groove by the wedge-shaped surface during the rotation of the rotor pump relative to the housing.

[0015] Optionally, the driving component is a drive motor, one end of which is coaxially connected to a first bevel gear, and the first stage of the gear includes a second bevel gear, wherein the first bevel gear meshes with the second bevel gear.

[0016] Optionally, each gear stage is provided with a gear shaft, one of which has a rectangular slot, and the pump shaft of the rotor pump is inserted into the rectangular slot.

[0017] The beneficial effects of the handheld threading machine provided in this application embodiment include, for example, simplifying the installation and disassembly process of the hinge plate body. The handheld threading machine includes a housing, a gear plate, a hinge plate body, and an unlocking disc. The gear plate is rotatably disposed within the housing, and the hinge plate body passes through the gear plate. Multiple grooves are spaced apart along the circumference of the hinge plate body. A torque transmission rod is movably disposed on the gear plate, and the torque transmission rod is used to engage with any one of the grooves. The unlocking disc is rotatably disposed on the gear plate, and an eccentric groove is formed on the unlocking disc. The torque transmission rod engages with the eccentric groove. During the rotation of the unlocking disc, the torque transmission rod engages with or disengages from the groove. During the installation of the hinge plate, the hinge plate is inserted into the gear plate. Because the torque transmission rod engages with the eccentric groove, the unlocking disc rotates forward, causing the torque transmission rod to move until it engages with any of the grooves, completing the installation of the hinge plate. During the disassembly of the hinge plate, because the torque transmission rod engages with the eccentric groove, the unlocking disc rotates in the opposite direction, causing the torque transmission rod to move until it disengages from the groove. At this point, the hinge plate can be removed from the gear plate, effectively simplifying the installation and disassembly process and facilitating maintenance or replacement of the hinge plate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a handheld threading machine in an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the first partially exploded structure of the handheld threading machine in the embodiments of this application;

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

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

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

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

[0025] Figure 7This is a schematic diagram of a second partially exploded structure of the handheld threading machine in an embodiment of this application;

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

[0027] Figure 9 This is a cross-sectional view of the rotor pump in an embodiment of this application.

[0028] Icons: 100-Housing; 110-Second Fastener; 120-Handheld Part; 130-Button; 140-Reversing Lever; 200-Gear Disc; 210-Torque Transmission Lever; 211-Pin; 212-Lever Head; 220-Transmission Lever Groove; 230-Guide Groove; 240-Accommodation Groove; 241-Compression Spring; 300-Hinge Plate; 310-Groove; 320-Cut Tool; 330-Fixing Disc; 400-Unlocking Disc; 41 0-Eccentric groove; 420-Boss; 430-Limiting groove; 440-Protrusion; 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 check valve; 670-Second check valve; 700-Oil tank. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0034] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0035] The inventors of this application have discovered that existing handheld threading machines typically have a hinge plate 300 mounted on a housing 100, with a cutting tool 320 mounted on the hinge plate 300. During thread machining, the rotation of the hinge plate 300 drives the cutting tool 320 to rotate, thus completing the thread machining. However, the current installation and disassembly process of the hinge plate 300 is quite cumbersome, making maintenance or replacement of the hinge plate 300 inconvenient. The embodiments of this application provide a handheld threading machine, at least to solve this technical problem.

[0036] Please refer to Figures 1-5 The handheld threading machine provided in the embodiments of this application includes a housing 100, a gear disc 200, a hinge plate body 300, and an unlocking disc 400. The gear disc 200 is rotatably disposed within the housing 100, and the hinge plate body 300 passes through the gear disc 200. The hinge plate body 300 has a plurality of grooves 310 spaced apart along its circumference. A torque transmission rod 210 is movably disposed on the gear disc 200 and is used to engage with any one of the grooves 310. The unlocking disc 400 is rotatably disposed on the gear disc 200 and has an eccentric groove 410. The torque transmission rod 210 engages with the eccentric groove 410. During the rotation of the unlocking disc 400, the torque transmission rod 210 engages with or disengages from the groove 310.

[0037] A through hole is provided in the middle of the gear disk 200, and the hinge plate body 300 passes through the through hole; the torque transmission rod 210 can move radially along the gear disk 200; the unlocking disk 400 and the gear disk 200 are arranged on the same axis, and both the unlocking disk 400 and the gear disk 200 can rotate around their own axis; the eccentric groove 410 is an arc-shaped groove, and the two ends of the eccentric groove 410 are at different distances from the axis of the unlocking disk 400.

[0038] Optionally, two torque transmission rods 210 are movably provided on the gear plate 200. The two torque transmission rods 210 are arranged opposite to each other and are used to cooperate with two grooves 310 respectively, so as to improve the stability of the connection between the hinge plate body 300 and the gear plate 200. Correspondingly, two eccentric grooves 410 are provided opposite to each other on the unlocking plate 400. The two torque transmission rods 210 cooperate with the two eccentric grooves 410 respectively. During the rotation of the unlocking plate 400, the two torque transmission rods 210 cooperate with or disengage from the corresponding grooves 310.

[0039] During the installation of the hinge plate 300, the hinge plate 300 is inserted into the through hole of the gear disk 200. Because the torque transmission rod 210 engages with the eccentric groove 410, the unlocking disk 400 rotates forward, causing the torque transmission rod 210 to move towards the axis of the gear disk 200 until one end of the torque transmission rod 210 extends into the through hole and engages with one of the grooves 310, thus completing the installation of the hinge plate 300. During the disassembly of the hinge plate 300, because the torque transmission rod 210 engages with the eccentric groove 410, the unlocking disk 400 rotates in the opposite direction, causing the torque transmission rod 210 to move away from the axis of the gear disk 200 until the torque transmission rod 210 disengages from the groove 310. At this point, the hinge plate 300 can be removed from the gear disk 200, effectively simplifying the installation and disassembly process of the hinge plate 300, thereby facilitating maintenance or replacement of the hinge plate 300.

[0040] In this embodiment, a transmission rod groove 220 is provided on the gear disk 200 along its own radial direction, and a torque transmission rod 210 is movably disposed in the transmission rod groove 220. A guide groove 230 connected to the transmission rod groove 220 is provided on the gear disk 200 along its own axial direction. A pin 211 is provided on the torque transmission rod 210, and the pin 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 211 extends along the axial direction of the gear disk 200. The pin 211 passes through the guide groove 230 and cooperates with the eccentric groove 410.

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

[0043] On the one hand, during the rotation of the unlocking disc 400, the pin 211 can move within the eccentric groove 410, thereby driving the torque transmission rod 210 to move within the transmission rod groove 220. On the other hand, by allowing the pin 211 to pass through the guide groove 230, the torque transmission rod 210 is less likely to rotate around its own axis, thereby ensuring that the torque transmission 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 are shaped to match, the rod head 212 is used to cooperate with any one of the grooves 310, and the draft angle of the rod head 212 and the groove 310 is 2-4°.

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

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

[0047] In this embodiment, the gear disk 200 is provided with a receiving groove 240, and the unlocking disk 400 is provided with a boss 420. 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 abuts against the boss 420.

[0048] The receiving groove 240 is also an arc-shaped groove that extends circumferentially along the toothed disc 200. The boss 420 extends toward the side of the toothed disc 200 and into the receiving groove 240. The unlocking disc 400 has multiple protrusions 440 that are easy for a person to hold, spaced apart circumferentially along the surface away from the toothed disc 200.

[0049] Under the force of the compression spring 241 on the boss 420, the unlocking disc 400 can always rotate forward on its own, thereby driving the torque transmission rod 210 to move toward the axis of the gear disc 200 until one end of the torque transmission rod 210 extends into the through hole and engages with one of the grooves 310, ensuring that the torque transmission rod 210 and the groove 310 are stably engaged. When it is necessary to unlock the hinge plate body 300, the person holds the protrusion 440 and rotates the unlocking disc 400 in the opposite direction. 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 gear disc 200 until the torque transmission rod 210 disengages from the groove 310. At this 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 plate 500, an unlocking plate 400 with a limiting groove 430, and a first fastener 510 on the positioning plate 500. The first fastener 510 passes through the limiting groove 430 and is connected to the toothed plate 200.

[0051] The positioning plate 500 is located on the side of the unlocking plate 400 opposite to the toothed plate 200. The unlocking plate 400 has multiple limiting grooves 430, each of which is an arc-shaped groove that extends circumferentially along the unlocking plate 400. The positioning plate 500 is provided with multiple first fasteners 510, which pass through the multiple limiting grooves 430 one by one and are connected to the toothed plate 200. The first fasteners 510 can be screws.

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

[0053] In addition, the interior of the hinge plate body 300 is used to insert pipe fittings, and the hinge plate body 300 is equipped with a cutting tool 320 for machining threads. During the rotation of the hinge plate body 300, the pipe fittings inserted inside the hinge plate body 300 can be processed. A fixing plate 330 is also provided on one side of the hinge plate body 300. The fixing plate 330 is connected to the hinge plate body 300 by bolts to fix the cutting tool 320 on the hinge plate body 300.

[0054] Please refer to Figures 6-9 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 drive unit and multi-stage gears are disposed within the housing 100. The drive unit is 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 gear disc 200 is connected to the last-stage gear. The rotor pump 610 has a first inlet / outlet and a second inlet / outlet. The first inlet / outlet is connected to the first pipeline 630. The first 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, and the third end of the three-way pipe 620 is connected to the hose 650. A first check valve 660 is provided between the three-way pipe 620 and the second pipeline 640, and a second check valve 670 is provided between the three-way pipe 620 and the hose 650. Both the first pipeline 630 and the second pipeline 640 are used to connect to the external oil tank 700. The end of the hose 650 away from the three-way pipe 620 is used to face the fitting.

[0055] One end of the first pipeline 630 is connected to the first inlet / outlet liquid port, and 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. The oil tank 700 is equipped with multiple layers of filter screens. Optionally, the pump shaft of the rotor pump 610 is coaxially connected to the second-stage gear.

[0056] During the threading process, the second-stage gear drives the pump shaft of the rotor pump 610 to rotate in the forward direction, causing the inner and outer rotors of the rotor pump 610 to rotate clockwise. 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 check valve 660 blocks the flow, and the oil can only be sprayed onto the surface of the pipe through the second check valve 670 and the hose 650, which plays a role in cooling and lubricating the pipe processing. The oil falling on the pipe will fall into the oil tank 700, thus realizing the recycling of the oil.

[0057] During the retraction process of the threading machine, the second-stage gear drives the pump shaft of the rotor pump 610 to rotate in the opposite direction, causing the inner and outer rotors of the rotor pump 610 to rotate counterclockwise. A 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 sequentially through the first one-way valve 660 and the first end of the three-way pipe 620, and then flows back to the oil tank 700 through the first inlet and outlet and the first pipeline 630, thereby realizing the internal circulation of the oil.

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

[0059] The mounting groove 611 is also an arc-shaped groove that extends circumferentially along the rotor pump 610. The second fastener 110 can be a bolt. The head of the bolt can be inserted 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 locked in the mounting groove 611.

[0060] In this embodiment, a wedge-shaped surface 613 is provided in the mounting groove 611. During the rotation of the rotor pump 610 relative to the housing 100, the second fastener 110 can be held in the mounting groove 611 by the wedge-shaped surface 613.

[0061] The wedge-shaped surface 613 is inclined relative to the surface of the rotor pump 610 facing the gear. During the rotation of the rotor pump 610 relative to the housing 100, the head of the bolt and the wedge-shaped surface 613 are pressed against each other, so that the head of the bolt is stuck in the mounting groove 611, and the rotor pump 610 is conveniently fixed relative to the housing 100.

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

[0063] In this embodiment, the driving component is a drive motor, and one end of the drive motor is coaxially connected to a first bevel gear. The first stage gear includes a second bevel gear, and the first bevel gear meshes with the second bevel gear.

[0064] By setting a first bevel gear at one end of the drive motor and meshing the first bevel gear with the second bevel gear, when the drive motor starts, the drive motor can drive the second bevel gear to rotate through the first bevel gear, thereby driving the subsequent multi-stage gears and the gear disk 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 slot is provided on one of the gear shafts, and the pump shaft of the rotor pump 610 is inserted into the rectangular slot.

[0066] For example, a rectangular groove is provided on the gear shaft of the second stage gear, and the end of the pump shaft of the rotor pump 610 facing the gear shaft matches the shape of the rectangular groove. When the pump shaft of the rotor pump 610 is inserted into the rectangular groove, the gear shaft can drive the pump shaft of the rotor pump 610 to rotate synchronously.

[0067] The housing 100 is also provided with a handhold 120. A button 130 and a reversing lever 140 are provided on the housing 100 near the handhold 120. Pressing the button 130 can start the drive motor, and pressing the reversing lever 140 on opposite sides can switch the direction of the drive shaft of the drive motor. The starting and switching of the drive motor can be achieved by a specific circuit, which will not be described in detail.

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

[0069] The process of assembling and disassembling the hinge plate 300: During the installation of the hinge plate 300, the hinge plate 300 is inserted into the through hole of the gear disc 200. Since the pin 211 on the torque transmission rod 210 cooperates with the eccentric groove 410, the compression spring 241 drives the unlocking disc 400 to rotate in the forward direction, thereby causing the torque transmission rod 210 to move towards the axis of the gear disc 200 until one end of the torque transmission rod 210 extends into the through hole and cooperates with one of the grooves 310, thus completing the installation of the hinge plate 300. During the disassembly of the hinge plate 300, since the pin 211 on the torque transmission rod 210 cooperates with the eccentric groove 410, the unlocking disc 400 is manually rotated in the opposite direction, which in turn drives the torque transmission rod 210 away from the axis of the gear disc 200 until the torque transmission rod 210 disengages from the groove 310. At this time, the hinge plate 300 can be removed from the through hole of the gear disc 200, which effectively simplifies the installation and disassembly process of the hinge plate 300, thereby facilitating the maintenance or replacement of the hinge plate 300.

[0070] The threading machine's feed and retraction process: During the feed process, press the reversing lever 140 to one side, then continuously press button 130 to make the drive motor rotate forward. The hinge plate 300 will rotate forward with the gear plate 200. At this time, hold the handle 120 to move the threading machine along the length of the pipe. When the cutter 320 has cut into the pipe about two turns, press button 130 to ensure 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, release button 130 to stop threading. During the feed process, the drive... The motor also drives the gears coaxially connected to the pump shaft to rotate the pump shaft of the rotor pump 610 in the forward direction, causing the inner and outer rotors of the rotor pump 610 to rotate clockwise. 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 check valve 660 blocks the flow, and the oil is sprayed onto the surface of the pipe fittings through the second check valve 670 and the hose 650, which cools and lubricates the pipe fittings. The oil falling off the pipe fittings will fall into the oil tank 700, thus realizing the recycling of the oil.

[0071] During the retraction process of the threading machine, press the reversing lever 140 to the other side, and then continuously press the button 130 to reverse the drive motor. The hinge plate 300 will rotate in the opposite direction with the gear plate 200 until the cutter 320 disengages from the pipe. At this time, release the button 130, and the threading operation is completed. During the retraction process, the drive motor will also drive the gear connected to the pump shaft to rotate the pump shaft of the rotor pump 610 in the opposite direction, so that the inner and outer rotors of the rotor pump 610 rotate counterclockwise. A 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 in sequence through the first one-way valve 660 and the first end of the three-way pipe 620, and then flows back to the oil tank 700 through the first inlet and outlet and the first pipeline 630, thereby realizing the internal circulation of the oil. There is always oil in the first inlet and outlet and the second inlet and outlet of the rotor pump 610, which ensures that the oil can be sprayed out in time during the next threading operation.

[0072] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A handheld threading machine, characterized in that, The device includes a housing (100), a gear disk (200), a hinge plate (300), and an unlocking disk (400). The gear disk (200) is rotatably disposed within the housing (100). The hinge plate (300) passes through the gear disk (200). The hinge plate (300) has multiple grooves (310) spaced apart along its circumference. A torque transmission rod (210) is movably disposed on the gear disk (200) and is used to engage with any one of the grooves (310). The unlocking disk (400) is rotatably disposed on the gear disk (200) and has an eccentric groove (410). The torque transmission rod (210) engages with the eccentric groove (410). During the rotation of the unlocking disk (400), the torque transmission rod (210) engages with or disengages from the groove (310). The gear disk (200) has a transmission rod groove (220) along its radial direction. The torque transmission rod (210) is movably disposed in the transmission rod groove (220). The gear disk (200) has a guide groove (230) along its axial direction that communicates with the transmission rod groove (220). The torque transmission rod (210) is provided with a pin (211), which passes through the guide groove (230) and cooperates with the eccentric groove (410).

2. The handheld threading machine according to claim 1, characterized in that, The torque transmission rod (210) is provided with a rod head (212), which is used to cooperate with any of the grooves (310). The draft angle of the rod head (212) and the groove (310) is 2-4°.

3. The handheld threading machine according to claim 1, characterized in that, The toothed disc (200) has a receiving groove (240), and the unlocking disc (400) has a boss (420). 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) abuts against the boss (420).

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

5. The handheld threading machine according to claim 1, characterized in that, 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). The housing (100) is provided with a drive component and a multi-stage gear. The drive component is connected to the first-stage gear. The pump shaft of the rotor pump (610) is coaxially connected to one of the first-stage gears. The gear disc (200) is connected to the last-stage gear. The rotor pump (610) is provided with a first inlet / outlet and a second inlet / outlet. The first inlet / outlet is connected to the first pipeline (630), and the second inlet / outlet is 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), and the third end of the three-way pipe (620) is connected to the hose (650). A first check valve (660) is provided between the three-way pipe (620) and the second pipeline (640), and a second check valve (670) is provided between the three-way pipe (620) and the hose (650). Both the first pipeline (630) and the second pipeline (640) are used to connect to an external oil tank (700). The end of the hose (650) away from the three-way pipe (620) is used to face the pipe fitting.

6. The handheld threading machine according to claim 5, characterized in that, The rotor pump (610) has a mounting groove (611) on the surface facing the gear, and the rotor pump (610) also has a through hole (612) communicating with the mounting groove (611) on the surface facing the gear. A second fastener (110) is provided on the housing (100), and the second fastener (110) is used to extend through the through hole (612) and be held in the mounting groove (611).

7. The handheld threading machine according to claim 6, characterized in that, The mounting groove (611) is provided with a wedge-shaped surface (613). During the rotation of the rotor pump (610) relative to the housing (100), the second fastener (110) can be held in the mounting groove (611) by the wedge-shaped surface (613).

8. The handheld threading machine according to claim 5, characterized in that, The driving component is a drive motor, and one end of the drive motor is coaxially connected to a first bevel gear. The first stage of the gear includes a second bevel gear, and the first bevel gear meshes with the second bevel gear.

9. The handheld threading machine according to claim 5, characterized in that, Each gear is provided with a gear shaft, and one of the gear shafts has a rectangular slot. The pump shaft of the rotor pump (610) is inserted into the rectangular slot.

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