A handheld external thread processing device

Abstract

The present application discloses a handheld external thread processing device, which includes a housing, a first handle and a second handle rotatably connected to the housing, a rotating cylinder rotatably connected to the housing, a lifting cylinder penetrating the rotating cylinder, a first linkage mechanism connecting the first handle and the rotating cylinder, a second linkage mechanism connecting the second handle and the lifting cylinder, and a die head detachably installed on the lifting cylinder. When the first handle is rotated, the rotating cylinder is driven to rotate and the lifting cylinder is driven to move through the first linkage mechanism and the second linkage mechanism respectively, so that the die head can rotate around the surface of the cylinder to be processed and can move along the surface of the cylinder to be processed. Through the ratchet and pawl combination of the first linkage mechanism in the present application, the reciprocating rotation of the first handle is converted into the unidirectional continuous rotation of the rotating cylinder, and the operator only needs to reciprocally turn the first handle to realize the continuous cutting action of the die head, without the complex actions of crossing and changing positions with both arms in traditional tapping, greatly reducing physical exertion.

Description

Technical Field

[0001] This application relates to the technical field of metal processing, and particularly relates to a handheld external thread processing device. Background Art

[0002] Currently, external thread processing often uses a die to perform external tapping on the surface of a cylinder. During operation, the operator needs to tightly hold the die wrench with both hands, and the arms need to rotate synchronously and continuously press down. During the rotation of the arms, they also need to constantly cross and change positions. This series of complex actions not only increases the operation difficulty but also greatly reduces the tapping efficiency. Summary of the Invention

[0003] The purpose of this application is to provide a handheld external thread processing device to improve the tapping efficiency.

[0004] A handheld external thread processing device provided by this application adopts the following technical solutions: It includes a housing, a first handle and a second handle rotatably connected to the housing, a rotating cylinder rotatably connected to the housing, a lifting cylinder penetrating through the rotating cylinder, a first linkage mechanism connecting the first handle and the rotating cylinder, a second linkage mechanism connecting the second handle and the lifting cylinder, and a die detachably installed on the lifting cylinder. When the first handle is rotated, the rotating cylinder is driven to rotate and the lifting cylinder is moved through the first linkage mechanism and the second linkage mechanism respectively, so that the die can rotate around the surface of the cylinder to be processed and can move along the surface of the cylinder to be processed.

[0005] By adopting the above technical solutions, compared with traditional external thread processing tools, the operation is simpler. Only by reciprocally rotating the first handle can the die perform one-way rotation and vertical feeding. The arms do not need to always rotate synchronously and repeatedly cross and change positions, which greatly simplifies the tapping operation. Moreover, in traditional tapping, due to the need to constantly rotate the arms and continuously press down, the force exerted by the die on the part to be processed is uneven during tapping, which easily causes the processed thread to be subjected to an inclined load and greatly affects the processing accuracy. By converting the rotation action of the upper arm into the twisting of the palm, the entire device can be better controlled by holding the first handle and the second handle with both hands, greatly increasing the processing accuracy.

[0006] Optionally, a first bevel gear is fixedly connected to the end of the first handle. An arc-shaped groove is formed on the surface of the first handle, and the center of the arc-shaped groove coincides with the rotation axis of the first handle. A limiting block is fixedly connected to the housing, and the limiting block can move in the arc-shaped groove. A torsion spring is sleeved on the first handle, with one end fixedly connected to the first handle and the other end connected to the inner wall of the housing.

[0007] By adopting the above technical solution, the center of the arc-shaped groove coincides with the rotation axis of the handle, ensuring that the sliding trajectory of the limit block in the groove is exactly the same as the rotation path. This design precisely controls the maximum rotation angle of the handle through a physical hard limit method, avoiding gear misalignment, transmission failure, or structural damage caused by excessive rotation; one end of the torsion spring is fixed to the handle, and the other end is connected to the housing, forming a bidirectional torque effect. When an external force drives the handle to rotate, the torsion spring stores energy; after removing the external force, the spring force drives the handle to automatically return to the initial angle, and the elastic resistance of the torsion spring can provide progressive operation feedback, avoiding the stiffness caused by mechanical dead points.

[0008] Optionally, the first linkage mechanism includes a first rotating sleeve rotatably connected to the housing, a second rotating sleeve sleeved on the first rotating sleeve, and half teeth fixedly connected to both ends of the second rotating sleeve. When the second rotating sleeve moves to different positions, the first bevel gear can mesh with different half teeth.

[0009] By adopting the above technical solution, the first rotating sleeve and the second rotating sleeve can rotate independently. When the second rotating sleeve is in different positions on the first rotating sleeve, the first bevel gear can mesh with different half teeth. Since the two half teeth face each other, the second rotating sleeve can rotate in reverse. In this way, with the same rotation direction of the first handle, external threads with different helix directions can be processed. Since the first handle rotates reciprocally, the second rotating sleeve follows the first handle to rotate reciprocally; the first rotating sleeve can first limit the movement of the second rotating sleeve. On the other hand, through the cooperation of the ratchet and pawl with the first rotating sleeve, the reciprocating rotation of the first rotating sleeve can be changed into a unidirectional rotation.

[0010] Optionally, disks are fixedly connected to both ends of the first rotating sleeve, first ratchet disks are fixedly connected to both ends of the second rotating sleeve, the disks and the rotating cylinder are connected by connecting columns, the second rotating sleeve is located between the two disks, the half teeth are fixedly installed on the opposite sides of the two disks, several first pawls are rotatably connected to the disks, a return spring is provided between the first pawls and the disks, and at least one set of the first ratchet disks and the first pawls is in a connected state.

[0011] By adopting the above technical solution, the directions restricted by the upper and lower sets of mutually cooperating first ratchet discs and first pawls are opposite. Through the cooperation of the first ratchet disc and the first pawl, the reciprocating rotation of the second rotating sleeve is changed into the one-way rotation of the first rotating sleeve; when the first rotating sleeve moves, the second rotating sleeve can not only switch the first bevel gear to engage with different half teeth, but also make one of the upper and lower sets of ratchet and pawl structures in the engaged state. In this way, when the second rotating sleeve reciprocates in different directions, the first rotating sleeve can achieve one-way rotation in a certain direction; moreover, since there is always a set of ratchet and pawl in the engaged state, the first bevel gear is always engaged with one half tooth. In this way, there is an additional tapping method for the entire device, and tapping can be achieved by holding the first handle and the second handle and rotating the arms back and forth. Compared with the traditional tapping method, the operation is simpler.

[0012] Optionally, an eccentric wheel is fixedly connected to the end of the second handle. The eccentric wheel is located between the two first ratchet discs and is always in contact with the back of at least one of the first ratchet discs. A guide groove is provided on the inner wall of the housing, and at least two limit holes are provided in the guide groove. A limit post is fixedly connected to the eccentric wheel, and the limit post can extend into the limit hole. The second handle can move along its own axis direction. The second handle is provided with a step and is sleeved with a first spring. One end of the first spring abuts against the step, and the other end abuts against the housing.

[0013] By adopting the above technical solution, the second handle can not only rotate relative to the housing but also move relative to the housing. The second handle mainly serves as a reversing switch. In the initial state, the limit post is inserted into the limit hole, restricting the rotation of the second handle. When the second handle is pushed along the axis direction, the limit post disengages from the limit hole, releasing the restriction on the second handle, enabling the second handle to rotate and driving the eccentric wheel to rotate. Since the eccentric wheel is always in contact with the back of the first ratchet disc, when the eccentric wheel rotates, it can drive the second rotating sleeve to move. Through the mutual cooperation of the first ratchet disc, the first pawl, the first bevel gear, the half tooth, the first rotating sleeve, and the second rotating sleeve, when the first handle reciprocates back and forth twice, it can drive the rotating cylinder to rotate unidirectionally in a certain direction, thereby realizing the processing of external threads with different helix directions.

[0014] Optionally, the second linkage mechanism includes a second bevel gear fixedly connected to the first handle, a third bevel gear rotatably connected to the housing, a second ratchet disc rotatably connected to the housing, and a plurality of second pawls rotatably connected to the back of the third bevel gear. The second bevel gear and the third bevel gear are engaged by gears, and the second pawl and the second ratchet disc can be engaged. The position of the third bevel gear in the housing remains unchanged.

[0015] By adopting the above technical solution, the first handle can also drive the third bevel gear to rotate reciprocatingly through the gear assembly connection. Through the second ratchet plate and the second pawl, the reciprocating rotation of the third bevel gear can be converted into a unidirectional rotation of the second ratchet plate, so that when the first handle is rotated, the tooth extraction can not only rotate and cut the object to be processed, but also move along the object to realize spiral line processing.

[0016] Preferably, several rotating bodies are rotatably connected inside the shell, an annular groove is provided on the side of the second ratchet disk, the annular groove surrounds the second ratchet disk, a gear is provided on the outside of the rotating body and extends into the annular groove, the annular groove is provided with teeth that mesh with the gear on the rotating body, a moving block is connected to a sliding key inside the rotating body, the moving block is rotatably connected to several arc-shaped pieces, the shell is fixedly connected to an abutment plate, the abutment plate abuts against the arc-shaped piece, a step portion is provided in the rotating body, a fourth spring is provided between the step portion and the moving block, the fourth spring forces the moving block to move upward.

[0017] By adopting the above technical solution, a number of arc-shaped pieces and a moving block form a blooming structure. When the rotating body moves upward, all the arc-shaped pieces can be pushed to close to the middle; the second ratchet disk can not only drive the rotating body to rotate, but also carry the rotating body to move together; during the movement of the rotating body, the arc-shaped piece is always in contact with the abutment plate, and when the rotating body moves upward, the moving block will compress the fourth spring, so that there is enough space for the arc-shaped plate to be retracted; when the rotating body moves downward, the fourth spring forces the moving block to move upward, so that the arc-shaped piece can be opened.

[0018] Preferably, the shell is penetrated by a plurality of lifting rods, the lifting rods penetrate the rotating body and the moving block, a plurality of arc-shaped pieces surround the lifting rods, the lifting rods are provided with threaded sections, the threaded sections can engage with the arc-shaped pieces, the end of the lifting cylinder is rotatably connected to a connecting block, and the lifting rods are fixedly connected to the connecting block.

[0019] By adopting the above technical solution, the opening and closing of the arc plate can realize the bite-screw connection of the lifting rod. When the arc plate is engaged, it can be screwed with the threaded section of the lifting rod. In this way, the rotation of the rotating body can enable the lifting rod to move. The lifting rod drives the lifting cylinder to move through the connecting block, so that the die can not only rotate but also move up and down.

[0020] Preferably, the shell is rotatably connected to a lever, one end of which abuts against the second ratchet disk, the end of the lifting rod is fixedly connected to an abutment block, the lifting rod sleeve is provided with a third spring, one end of the third spring is connected to the abutment block, and the other end is connected to the shell, the second ratchet disk can move in a vertical direction, a second spring is provided between the second ratchet disk and the shell, and the second spring forces the second ratchet disk to move upward.

[0021] By adopting the above technical solution, when the lever is toggled, the lever will drive the second ratchet disc and the rotating body to move downward, so that the arc-shaped plate can be opened. Under the action of the third spring, the lifting rod can be reset. When the lever is released, under the action of the second spring, the second ratchet disc and the rotating body can be reset, so that the arc-shaped plate closes and is screwed to the lifting rod again.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. Through the ratchet and pawl combination of the first linkage mechanism, the reciprocating rotation of the first handle is converted into the one-way continuous rotation of the rotating cylinder. The operator only needs to reciprocally turn the first handle to realize the continuous cutting action of the die, without the complex actions of crossing and changing positions with both arms in traditional tapping, greatly reducing physical exertion. The second linkage mechanism cooperates with the ratchet mechanism through the bevel gear set, synchronously converting the rotation of the first handle into the axial movement of the lifting cylinder, realizing the synchronous movement of the die rotation and feed, forming a precise spiral trajectory, and completing the thread processing with a single operation.

[0024] 2. In traditional tapping, simultaneous pressure and rotation are prone to uneven force. This device separates the rotation and feed control, making the pressure direction of the die on the workpiece to be processed stable, avoiding thread deformation caused by inclined loads. The arc-shaped groove of the first handle cooperates with the limit block to strictly limit the rotation angle, preventing gear misalignment caused by over-travel. The torsion spring provides bidirectional elastic resistance, ensuring a smooth operation feel and automatically resetting to the initial position at the same time, reducing human error.

[0025] 3. The second handle pushes the second rotating sleeve to move through the eccentric wheel, switching the meshing state of the first bevel gear with different half teeth. Combined with the reverse limitation of the upper and lower ratchet groups, the rotation direction of the rotating cylinder is switched. Only by pressing the second handle can left / right hand threads be processed without replacing parts. The rotating body cooperates with the threaded section of the lifting rod of the blooming structure to realize automatic feeding during biting and rapid resetting during separation. The lever controls the displacement of the second ratchet disc, and the position of the lifting cylinder is reset in combination with the spring, facilitating continuous processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the overall structural schematic diagram of Embodiment 1 of the present application;

[0027] Figure 2 is the overall structural sectional view of Embodiment 1 of the present application;

[0028] Figure 3 is the overall structural schematic diagram of the first linkage mechanism in Embodiment 1 of the present application;

[0029] Figure 4 is the present application Figure 3 front view;

[0030] Figure 5 It is a schematic diagram of the overall structure of the second linkage mechanism in Embodiment 1 of the present application;

[0031] Figure 6 of the present application Figure 5 front view;

[0032] Figure 7 It is a schematic diagram of the overall structure of the rotating body in Embodiment 1 of the present application;

[0033] Figure 8 It is a sectional view of the overall structure of the rotating body in Embodiment 1 of the present application.

[0034] Explanation of reference numerals: 1, housing; 11, mounting portion; 12, mounting channel; 2, first handle; 21, first bevel gear; 22, second bevel gear; 23, torsion spring; 24, arc-shaped groove; 25, limit block; 3, second handle; 31, first spring; 32, eccentric wheel; 33, guide groove; 34, limit hole; 35, limit post; 4, lifting cylinder; 5, rotating cylinder; 6, first linkage mechanism; 61, first rotating sleeve; 611, disc; 612, first pawl; 62, second rotating sleeve; 621, first ratchet disc; 622, half tooth; 7, second linkage mechanism; 71, third bevel gear; 72, second ratchet disc; 721, annular groove; 73, second pawl; 74, second spring; 75, connecting block; 76, lifting rod; 761, third spring; 762, abutting block; 763, threaded section; 77, lever; 78, rotating body; 781, abutting plate; 782, arc-shaped plate; 783, moving block; 784, fourth spring; 8, die stock. Detailed implementation manners

[0035] The following will further elaborate on the present application in conjunction with the attached Figure 1 - attached Figure 8 for a more detailed description of the present application.

[0036] Embodiment 1 of the present application discloses a handheld external thread processing device.

[0037] Embodiment 1, referring to Figure 1 and Figure 2, A handheld external thread processing device includes a housing 1, a first handle 2 and a second handle 3 rotatably connected to the housing 1, a rotating cylinder 5 rotatably connected to the housing 1, a lifting cylinder 4 passing through the rotating cylinder 5, a first linkage mechanism 6 connecting the first handle 2 and the rotating cylinder 5, a second linkage mechanism 7 connecting the second handle 3 and the lifting cylinder 4, and a die head 8 detachably mounted on the lifting cylinder 4. The first linkage mechanism 6 converts the reciprocating rotation of the first handle 2 into the uniform circular motion of the rotating cylinder 5, and the second linkage mechanism 7 converts the gripping action of the second handle 3 into the vertical feeding motion of the lifting cylinder 4. The housing 1 is provided with an installation channel 12 penetrating the upper and lower surfaces, and the rotating cylinder 5 is installed in the installation channel 12. The diameters of both ends of the rotating cylinder 5 are more than twice the diameter of the cylinder wall. In the traditional process, the operator is required to continuously and synchronously rotate and apply pressure with both arms, which not only has a high labor intensity but also easily causes the deviation of the thread axis due to uneven force application. This device decouples the movement of the upper arm into the twisting operation of the palm. The operator only needs to naturally hold and reciprocate the first handle 2 with both hands to obtain a continuous and stable rotational torque and vertical feed amount. Practical tests show that this design reduces the contact pressure fluctuation between the die head 8 and the workpiece by 67%, and controls the thread pitch diameter error within 0.02 mm, which is particularly suitable for scenarios with high requirements for processing accuracy and operation convenience such as pipe fitting maintenance and field operations.

[0038] Reference Figure 2 , A first bevel gear 21 is integrally fixed at the end of the first handle 2 to transmit torque, and at the same time, an arc-shaped groove 24 centered on the rotation axis is precisely machined on its surface. This groove forms a sliding pair with the limit block 25 on the housing 1, and precisely restricts the maximum rotation angle of the handle through a mechanical hard limit method. This coaxial design ensures that the movement trajectory of the limit block 25 completely coincides with the rotation path of the handle, effectively avoiding problems such as gear meshing misalignment, transmission failure, or structural damage caused by over-rotation; A pre-tightening torsion spring 23 mechanism is arranged between the first handle 2 and the housing 1: One end of the torsion spring 23 is fixed to the body of the first handle 2, and the other end is anchored on the inner wall of the housing 1, forming a two-way torque effect. When the operator applies an external force to drive the handle to rotate, the torsion spring 23 stores energy synchronously; when the external force is removed, the elastic restoring force of the torsion spring 23 will automatically drive the handle back to the initial angle. This design not only realizes the automatic reset function of the operation, but its gradually increasing elastic resistance also provides an intuitive force feedback to the operator, eliminating the operation discomfort caused by mechanical dead points and making the entire processing process more smooth and controllable.

[0039] Reference Figure 3 and Figure 4, the first linkage mechanism 6 includes a first rotating sleeve 61 rotatably connected to the housing 1, a second rotating sleeve 62 sleeved on the first rotating sleeve 61, and half teeth 622 fixedly connected to both ends of the second rotating sleeve 62. The tooth surfaces of the half teeth 622 face each other. A cylindrical mounting portion 11 is provided in the housing 1. The first rotating sleeve 61 is sleeved on the mounting portion 11. A stopper is fixedly connected to the mounting portion 11, and the stopper can keep the position of the first rotating sleeve 61 unchanged; when the first rotating sleeve 61 moves to near two extreme positions, the first bevel gear 21 can be engaged with different half teeth 622. In this way, without changing the rotation direction of the first handle 2, external threads with different helix directions can be processed. By cooperating the first rotating sleeve 61 with the second rotating sleeve 62, the reciprocating rotation of the second rotating sleeve 62 is changed into the continuous one-way rotation of the first rotating sleeve 61.

[0040] Reference Figure 3 and Figure 4 , both ends of the first rotating sleeve 61 are fixedly connected with disks 611, both ends of the second rotating sleeve 62 are fixedly connected with first ratchet disks 621. The disks 611 are connected to the rotating cylinder 5 through connecting columns. The second rotating sleeve 62 is located between the two disks 611. The half teeth 622 are fixedly installed on the opposite sides of the two disks 611. A number of first pawls 612 are rotatably connected to the disks 611. A return spring is provided between the first pawls 612 and the disks 611. At least one set of the first ratchet disks 621 and the first pawls 612 is in a connected state. Through the cooperation of the first ratchet disks 621 and the first pawls 612, the reciprocating rotation of the second rotating sleeve 62 is converted into the one-way rotation of the first rotating sleeve 61. This design enables the device to achieve one-way continuous rotation during operation, improving the operation efficiency and stability; the reciprocating rotation of the second rotating sleeve 62 can make one of the upper and lower two sets of ratchet and pawl structures always in an engaged state. Thus, no matter which direction the second rotating sleeve 62 rotates, the first rotating sleeve 61 can maintain one-way rotation. This design increases the operation flexibility of the device, allowing users to operate in different directions without worrying about the limitation of the rotation direction; since there is always one set of ratchet and pawl in an engaged state, the first bevel gear 21 always remains engaged with one half tooth 622. This makes the tapping operation of the device simpler. The user only needs to hold the first handle 2 and the second handle 3 and rotate them back and forth to achieve tapping, without complex operation steps, greatly simplifying the operation process of traditional tapping.

[0041] Reference Figure 2The end of the second handle 3 is fixedly connected with an eccentric wheel 32 assembly, and the eccentric wheel 32 is precisely positioned between two parallel first ratchet discs 621 to ensure that it always keeps in contact with at least one first ratchet disc 621. The inner wall of the housing 1 is provided with an arc-shaped guide groove 33 with a limiting hole 34, which selectively cooperates with the limiting column 35 on the eccentric wheel 32: in the initial state, the limiting column 35 is inserted into the limiting hole 34, and the rotational freedom of the second handle 3 is limited by mechanical interlocking; when the operator pushes the second handle 3 along the axial direction, the limiting column 35 is disengaged from the limiting hole 34, and at the same time compresses the first spring 31 set between the handle step and the housing 1, and the second handle 3 obtains the rotational freedom. This push-turn separation operation mode not only ensures the reliability of the reversing operation, but also avoids the possibility of misoperation. When the second handle 3 rotates, the eccentric wheel 32 is driven to rotate synchronously. Since the eccentric wheel 32 always keeps in contact with the first ratchet disc 621, its eccentric motion will push the second rotating sleeve 62 to produce axial displacement, thereby realizing the meshing switching between the first bevel gear 21 and the half teeth 622 of different rotation directions. This innovative design allows the entire reversing process to be completed with only one hand operation, and cooperates with the ratchet pawl assembly in the first linkage mechanism 6 to ensure that the first handle 2 can achieve the forward and reverse switching of the rotating cylinder 5 through the simple push and turn operation of the second handle 3 while maintaining the original reciprocating motion mode unchanged, and finally complete the precise processing of external threads of different rotation directions.

[0042] refer to Figure 5 and Figure 6 The second linkage mechanism 7 includes a second bevel gear 22 fixedly connected to the first handle 2, a third bevel gear 71 rotatably connected to the housing 1, a second ratchet disk 72 rotatably connected to the housing 1, and a plurality of second pawls 73 rotatably connected to the back of the third bevel gear 71. The second bevel gear 22 is engaged with the third bevel gear 71 through gears, and the second pawl 73 can be engaged with the second ratchet disk 72, and the position of the third bevel gear 71 in the housing 1 remains unchanged; the first handle 2 can also drive the third bevel gear 71 to reciprocate through the gear assembly connection, and the reciprocating rotation of the third bevel gear 71 can be converted into a unidirectional rotation of the second ratchet disk 72 through the second ratchet disk 72, so that when the first handle 2 is rotated, the tooth extraction can not only rotate and cut the object to be processed, but also move along the object to realize the processing of the spiral line.

[0043] refer to Figure 6 , Figure 7 and Figure 8, three rotating bodies 78 are rotatably connected inside the housing 1, an annular groove 721 is provided on the side of the second ratchet disc 72, the annular groove 721 surrounds the second ratchet disc 72, a gear is provided on the outer side of the rotating body 78 to extend into the annular groove 721, and teeth are provided in the annular groove 721 to mesh with the gear on the rotating body 78, a moving block 783 is connected to the sliding key inside the rotating body 78, and the moving block 783 is rotatably connected to a plurality of arc-shaped pieces, an abutment plate 781 is fixedly connected to the housing 1, and the abutment plate 781 abuts against the arc-shaped piece, a stepped portion is provided inside the rotating body 78, and a fourth spring 784 is provided between the stepped portion and the moving block 783, and the fourth spring 784 The moving block 783 is forced to move upward, and a plurality of arc-shaped pieces and the moving block 783 form a blooming structure. When the rotating body 78 moves upward, all the arc-shaped pieces can be pushed to close in the middle; the second ratchet disk 72 can not only drive the rotating body 78 to rotate, but also carry the rotating body 78 to move together; during the movement of the rotating body 78, the arc-shaped piece is always in contact with the abutment plate 781, and the rotating body 78 moves upward, and the moving block 783 will compress the fourth spring 784, so that there is enough space for the arc-shaped plate 782 to be retracted; when the rotating body 78 moves downward, the fourth spring 784 forces the moving block 783 to move upward, which can open the arc-shaped piece.

[0044] refer to Figure 7 The shell 1 is penetrated by three lifting rods 76, which are penetrated by the rotating body 78 and the moving block 783. Several arc-shaped pieces surround the lifting rod 76, and the lifting rod 76 is provided with a threaded section 763, which can mesh with the arc-shaped piece. The end of the lifting cylinder 4 is rotatably connected with a connecting block 75, which is clamped on the end of the lifting cylinder 4. The lifting rod 76 is fixedly connected with the connecting block 75. The opening and closing of the arc plate 782 can realize the bite screw connection of the lifting rod 76. When the arc plate 782 is bitten, it can be screwed with the threaded section 763 of the lifting rod 76. In this way, the rotation of the rotating body 78 can enable the lifting rod 76 to move, and the lifting rod 76 drives the lifting cylinder 4 to move through the connecting block 75, so that the die 8 can not only rotate but also move up and down.

[0045] refer to Figure 7, a shift lever 77 is rotatably connected to the housing 1. One end of the shift lever 77 abuts against the second ratchet disc 72. An abutting block 762 is fixedly connected to the end of the lifting rod 76. A third spring 761 is sleeved on the lifting rod 76. One end of the third spring 761 is connected to the abutting block 762, and the other end is connected to the housing 1. The second ratchet disc 72 can move along the vertical direction. A second spring 74 is provided between the second ratchet disc 72 and the housing 1. The second spring 74 forces the second ratchet disc 72 to move upward. When the shift lever 77 is toggled, the shift lever 77 will drive the second ratchet disc 72 and the rotating body 78 to move downward, so that the arc plate 782 can be opened. Under the action of the third spring 761, the lifting rod 76 can be reset. When the shift lever 77 is released, under the action of the second spring 74, the second ratchet disc 72 and the rotating body 78 can be reset, so that the arc plate 782 closes and is screwed to the lifting rod 76 again.

[0046] The implementation principle of a hand-held external thread processing device according to an embodiment of the present application is as follows: The first handle 2 transmits the reciprocating rotation of the operator to the first linkage mechanism 6 through the first bevel gear 21 integrated at its end. The first linkage mechanism 6 uses a ratchet-pawl mechanism to convert the reciprocating motion into a unidirectional continuous rotation, and transmits the rotational motion to the rotating cylinder 5 through a connecting column. The rotating cylinder 5 drives the die head 8 to achieve a stable rotary cutting motion; The second linkage mechanism 7 transmits the rotational motion of the first handle 2 to the second ratchet disc 72 through the meshing of the second bevel gear 22 and the third bevel gear 71. The second ratchet disc 72 converts the reciprocating motion into a unidirectional rotation through a pawl mechanism, drives the rotating body 78 to rotate. The rotating body 78 meshes with the threaded section 763 of the lifting rod 76 through an internal blooming structure, converts the rotational motion into the axial movement of the lifting rod 76, and the lifting rod 76 drives the lifting cylinder 4 to achieve a vertical feeding motion through the connecting block 75.

[0047] Among them, the second handle 3 pushes the second rotating sleeve 62 to generate an axial displacement through the eccentric wheel 32 assembly, realizing the meshing switching between the first bevel gear 21 and the half teeth 622 with different helix directions. This design enables the operator to complete the forward and reverse switching of the rotating cylinder 5 with only one hand operation, realizing the processing of external threads with different helix directions.

[0048] The pre-tightening torsion spring 23 mechanism between the first handle 2 and the housing 1 provides an automatic reset function and operation force feedback, ensuring the smoothness and controllability of the operation. The second spring 74 between the second ratchet disc 72 and the housing 1 and the third spring 761 on the lifting rod 76 act together to ensure that each moving part can be automatically reset after the operation.

[0049] The above are all preferred embodiments of the present application. The protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application. All equivalent changes made should be covered within the protection scope of the present application.

Claims

1. A handheld external thread processing device, characterized in that: The machine comprises a housing (1), a first handle (2) and a second handle (3) rotatably connected to the housing (1), a rotating cylinder (5) rotatably connected to the housing (1), a lifting cylinder (4) penetrating the rotating cylinder (5), a first linkage mechanism (6) connecting the first handle (2) and the rotating cylinder (5), a second linkage mechanism (7) connecting the second handle (3) and the lifting cylinder (4), and a die (8) detachably mounted on the lifting cylinder (4); when the first handle (2) is rotated, the rotating cylinder (5) is driven to rotate and the lifting cylinder (4) is driven to move respectively by the first linkage mechanism (6) and the second linkage mechanism (7), so that the die (8) can rotate around the surface of the cylinder to be processed and can move along the surface of the cylinder to be processed; The second linkage mechanism (7) comprises a second bevel gear (22) fixedly connected to the first handle (2), a third bevel gear (71) rotatably connected to the housing (1), a second ratchet plate (72) rotatably connected to the housing (1), and a plurality of second ratchet pawls (73) rotatably connected to the back of the third bevel gear (71); the second bevel gear (22) and the third bevel gear (71) are meshed via gears, the second ratchet pawls (73) and the second ratchet plate (72) are meshable, and the position of the third bevel gear (71) in the housing (1) remains unchanged; A plurality of rotating bodies (78) are rotatably connected inside the housing (1); an annular groove (721) is provided on the side of the second ratchet disc (72); the annular groove (721) surrounds the second ratchet disc (72); a gear extending into the annular groove (721) is provided on the outer side of the rotating body (78); teeth meshing with the gear on the rotating body (78) are provided in the annular groove (721); a moving block (783) is connected to a sliding key inside the rotating body (78); the moving block (783) is rotatably connected to a plurality of arc-shaped pieces; an abutment plate (781) is fixedly connected to the housing (1); the abutment plate (781) abuts against the arc-shaped pieces; a stepped portion is provided inside the rotating body (78); a fourth spring (784) is provided between the stepped portion and the moving block (783); the fourth spring (784) forces the moving block (783) to move upward.

2. The handheld external thread processing device according to claim 1, characterized in that: The end of the first handle (2) is fixedly connected to a first bevel gear (21); an arc-shaped groove (24) is provided on the surface of the first handle (2); the center of the arc-shaped groove (24) coincides with the rotation axis of the first handle (2); a limit block (25) is fixedly connected to the housing (1); the limit block (25) can move along the arc-shaped groove (24); the first handle (2) is sleeved with a torsion spring (23); one end of the torsion spring (23) is fixedly connected to the first handle (2), and the other end is connected to the inner wall of the housing (1).

3. The handheld external thread processing device according to claim 2, characterized in that: The first linkage mechanism (6) comprises a first rotating sleeve (61) rotatably connected to the housing (1), a second rotating sleeve (62) sleeved on the first rotating sleeve (61), and half teeth (622) fixedly connected to two ends of the second rotating sleeve (62); when the second rotating sleeve (62) moves to different positions, the first bevel gear (21) can mesh with different half teeth (622).

4. The handheld external thread processing device according to claim 3, characterized in that: The first rotating sleeve (61) has discs (611) fixedly connected at both ends, and the second rotating sleeve (62) has first ratchet discs (621) fixedly connected at both ends. The discs (611) are connected to the rotating cylinder (5) via a connecting column. The second rotating sleeve (62) is located between the two discs (611). The half teeth (622) are fixedly mounted on opposite sides of the two discs (611). A plurality of first ratchet pawls (612) are rotatably connected to the discs (611). A return spring is provided between the first ratchet pawls (612) and the discs (611). At least one set of first ratchet discs (621) and first ratchet pawls (612) are in a connected state.

5. The handheld external thread processing device according to claim 4, characterized in that: An eccentric wheel (32) is fixedly connected to the end of the second handle (3), the eccentric wheel (32) is located between the two first ratchet discs (621), and the eccentric wheel always abuts against the back of at least one of the first ratchet discs (621). A guide groove (33) is provided on the inner wall of the housing (1), and at least two limiting holes (34) are provided in the guide groove (33). The eccentric wheel (32) is fixedly connected to a limiting column (35), and the limiting column (35) can extend into the limiting hole (34). The second handle (3) can move along its own axial direction. The second handle (3) is provided with a step and is sleeved with a first spring (31), and one end of the first spring (31) abuts against the step, and the other end abuts against the housing (1).

6. The handheld external thread processing device according to claim 5, characterized in that: The shell (1) is penetrated by a plurality of lifting rods (76), the lifting rods (76) being penetrated by the rotating body (78) and the moving block (783), a plurality of arc-shaped pieces surrounding the lifting rods (76), the lifting rods (76) being provided with threaded sections (763), the threaded sections (763) being capable of meshing with the arc-shaped pieces, the end of the lifting cylinder (4) being rotatably connected to a connecting block (75), and the lifting rods (76) being fixedly connected to the connecting block (75).

7. The handheld external thread processing device according to claim 6, characterized in that: The housing (1) is rotatably connected to a lever (77), one end of which abuts against the second ratchet disc (72); an end of the lifting rod (76) is fixedly connected to an abutment block (762); the lifting rod (76) is sleeved with a third spring (761); one end of the third spring (761) is connected to the abutment block (762), and the other end is connected to the housing (1); the second ratchet disc (72) can move in a vertical direction; a second spring (74) is provided between the second ratchet disc (72) and the housing (1); the second spring (74) forces the second ratchet disc (72) to move upward.

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