Handheld external thread machining device

Abstract

The invention discloses a handheld external thread machining device. Comprising a shell, a first handle, a second handle, a rotating cylinder, a lifting cylinder, a first linkage mechanism, a second linkage mechanism and a threading die, wherein the first handle and the second handle are rotationally connected to the shell, the rotating cylinder is rotationally connected to the shell, the lifting cylinder penetrates through the rotating cylinder, the first handle and the rotating cylinder are connected through the first linkage mechanism, the second handle and the lifting cylinder are connected through the second linkage mechanism, and the threading die is detachably installed on the lifting cylinder. The first linkage mechanism and the second linkage mechanism drive the rotating cylinder to rotate and drive the lifting cylinder to move correspondingly, so that the threading die can rotate around the surface of a to-be-machined cylinder and can move along the surface of the to-be-machined cylinder. Through the ratchet wheel and pawl combination of the first linkage mechanism, reciprocating rotation of the first handle is converted into one-way continuous rotation of the rotating cylinder, an operator only needs to twist the first handle in a reciprocating mode to achieve the continuous cutting action of the threading die, the complex action of double-arm cross transposition in traditional tapping is not needed, and physical output is greatly reduced.

Description

Technical Field

[0001] The present application relates to the technical field of metal processing, and in particular to a handheld external thread processing device. Background Art

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

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

[0004] A handheld external thread processing device provided in the present application adopts the following technical solution: it includes a shell, a first handle and a second handle rotatably connected to the shell, a rotating cylinder rotatably connected to the shell, a lifting cylinder passing 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 mounted 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 respectively by the first linkage mechanism and the second linkage mechanism, so that the die can rotate around the cylindrical surface to be processed and can move along the cylindrical surface to be processed.

[0005] By adopting the above technical solution, compared with traditional external thread processing tools, the operation is simpler. You only need to reciprocate the first handle to make the die rotate in one direction and feed in the vertical direction. The two arms do not need to rotate synchronously all the time, and the repeated cross-change of positions greatly simplifies the tapping operation. In addition, traditional tapping requires both arms to rotate continuously and to press down continuously, which will cause the die to be unevenly stressed on the processed parts during the tapping process, which can easily cause the processed threads to be subjected to tilted loads, greatly affecting the processing accuracy. By converting the rotation of the upper arm into the twisting of the palm, the entire equipment can be better controlled by holding the first and second handles 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 provided on the surface of the first handle, the center of the arc-shaped groove coincides with the rotation axis of the first handle, a limit block is fixedly connected to the shell, and the limit block can move in the arc-shaped groove, and the first handle is provided with a torsion spring, one end of the torsion spring is fixedly connected to the first handle, and the other end is connected to the inner wall of the shell.

[0007] By adopting the above technical solution, the center of the arc groove coincides with the rotation axis of the handle, ensuring that the sliding trajectory of the limit block in the groove is completely consistent with the rotation path. This design uses physical hard limiting to accurately control the maximum rotation angle of the handle to avoid gear dislocation, 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 shell to form a bidirectional torque effect. When an external force drives the handle to rotate, the torsion spring stores energy; after the external force is removed, the spring force drives the handle to automatically return to the initial angle. The elastic resistance of the torsion spring can provide progressive operation feedback to avoid the stiffness caused by the mechanical dead point.

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

[0009] By adopting the above technical solution, the first rotating sleeve and the second rotating sleeve can rotate independently. The second rotating sleeve can make the first bevel gear mesh with different half teeth at different positions of the first rotating sleeve. Since the two half teeth are facing relative to each other, the second rotating sleeve can perform reversing rotation, so that the first handle remains in the same direction and external threads of different rotation directions can be processed. Since the first handle rotates reciprocatingly, the second rotating sleeve reciprocates with the first handle; the first rotating sleeve can first limit the movement of the second rotating sleeve, and on the other hand, the ratchet pawl cooperates with the first rotating sleeve to convert the reciprocating rotation of the first rotating sleeve into unidirectional rotation.

[0010] Optionally, the first rotating sleeve has discs fixedly connected at both ends, the second rotating sleeve has first ratchet discs fixedly connected at both ends, the discs are connected to the rotating cylinder via a connecting column, the second rotating sleeve is located between the two discs, the half teeth are fixedly mounted on opposite sides of the two discs, a plurality of first pawls are rotatably connected to the discs, a reset spring is provided between the first pawl and the disc, and at least one set of first ratchet discs and first pawls are in a connected state.

[0011] By adopting the above technical scheme, the upper and lower groups of first ratchet discs and first pawls that can cooperate with each other limit directions in opposite directions. Through the cooperation of the first ratchet disc and the first pawl, the reciprocating rotation of the second rotating sleeve is converted into a unidirectional 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 ratchet pawl structures in the upper and lower groups in an engaged state, so that when the second rotating sleeve reciprocates in different directions, the first rotating sleeve can achieve unidirectional rotation in a certain direction; not only that, because there is always a group of ratchet pawls in an engaged state, the first bevel gear is always in an engaged state with one half tooth, so that the whole equipment has an additional tapping method, and tapping can be achieved by holding the first handle and the second handle and rotating both arms back and forth, which is simpler to operate than the traditional tapping method.

[0012] Optionally, an eccentric wheel is fixedly connected to the end of the second handle, and the eccentric wheel is located between the two first ratchet disks. The eccentric wheel is always in contact with the back of at least one of the first ratchet disks. A guide groove is provided on the inner wall of the shell, and at least two limit holes are provided in the guide groove. The eccentric wheel is fixedly connected to a limit column, and the limit column can extend into the limit hole. The second handle can move along its own axial 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 shell.

[0013] By adopting the above technical scheme, the second handle can be rotated and moved relative to the shell body. The second handle is mainly used as a reversing switch. In the initial state, the limit column is inserted into the limit hole to limit the rotation of the second handle. When the second handle is pushed along the axial direction, the limit column disengages from the limit hole, releasing the restriction of the second handle, so that the second handle can rotate and drive the eccentric wheel to rotate. Since the eccentric wheel is always in abutment with the back of the first ratchet disk, the eccentric wheel can drive the second rotating sleeve to move when it rotates. The first ratchet disk, the first pawl, the first bevel gear, the half tooth, the first rotating sleeve, and the second rotating sleeve cooperate with each other, so that when the first handle rotates back and forth, it can drive the rotating cylinder to rotate unidirectionally in a certain direction, thereby realizing external thread processing with different rotation 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 shell, a second ratchet plate rotatably connected to the shell, and a plurality of second pawls rotatably connected to the back side of the third bevel gear. The second bevel gear is meshed with the third bevel gear through gears, the second pawl can be meshed with the second ratchet plate, and the position of the third bevel gear remains unchanged in the shell.

[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 pulled, the lever will drive the second ratchet disk and the rotating body to move downward, so that the arc plate can be opened, and 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 disk and the rotating body can be reset, so that the arc 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: 1. Through the ratchet and pawl combination of the first linkage mechanism, the reciprocating rotation of the first handle is converted into a unidirectional continuous rotation of the rotating cylinder. The operator only needs to twist the first handle back and forth to achieve continuous cutting action of the die, without the complex action of crossing and changing positions of both arms in traditional tapping, which greatly reduces physical exertion; the second linkage mechanism cooperates with the bevel gear set and the ratchet mechanism to synchronously convert the rotation of the first handle into the axial movement of the lifting cylinder, realizing the synchronous movement of die rotation and feed, forming a precise spiral trajectory, and completing thread processing in a single operation.

[0023] 2. Traditional tapping requires simultaneous pressure and rotation, which can easily lead to uneven force. This device separates rotation and feed control to stabilize the pressure direction of the die on the workpiece to avoid thread deformation caused by tilted loads. The arc groove of the first handle cooperates with the limit block to strictly limit the rotation angle and prevent gear misalignment caused by over-travel; the torsion spring provides bidirectional elastic resistance to ensure smooth operation, and automatically resets to the initial position to reduce human errors.

[0024] 3. The second handle pushes the second rotating sleeve to move through the eccentric wheel, switches the meshing state of the first bevel gear and different half teeth, and realizes the rotation switch of the rotating cylinder by combining the reverse limit of the upper and lower ratchet groups. Only pressing the second handle can process left / right threads without replacing parts; the rotating body and the flowering structure cooperate with the thread segment lifting rod to realize automatic feeding during engagement and rapid reset during separation. The lever controls the displacement of the second ratchet disk, and the spring is combined to reset the lifting cylinder position, which is convenient for continuous processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application; Figure 2 is a cross-sectional view of the overall structure of Example 1 of the present application; Figure 3 is a schematic diagram of the overall structure of the first linkage mechanism in Example 1 of the present application; Figure 4 This application Figure 3 A front view of Figure 5 is a schematic diagram of the overall structure of the second linkage mechanism in Example 1 of the present application; Figure 6This application Figure 5 A front view of Figure 7 is a schematic diagram of the overall structure of the rotating body in Example 1 of the present application; Figure 8 It is a cross-sectional view of the overall structure of the rotating body in Example 1 of the present application.

[0026] Description of the accompanying drawings: 1. housing; 11. mounting portion; 12. mounting channel; 2. first handle; 21. first bevel gear; 22. second bevel gear; 23. torsion spring; 24. arc groove; 25. limit block; 3. second handle; 31. first spring; 32. eccentric wheel; 33. guide groove; 34. limit hole; 35. limit column; 4. lifting cylinder; 5. rotating cylinder; 6. first linkage mechanism; 61. first rotating sleeve; 611. disc; 612. first pawl; 62. The second rotating sleeve; 621, the first ratchet disk; 622, the half tooth; 7, the second linkage mechanism; 71, the third bevel gear; 72, the second ratchet disk; 721, the annular groove; 73, the second pawl; 74, the second spring; 75, the connecting block; 76, the lifting rod; 761, the third spring; 762, the abutment block; 763, the threaded section; 77, the shifting rod; 78, the rotating body; 781, the abutment plate; 782, the arc plate; 783, the moving block; 784, the fourth spring; 8, the die. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1 -Attached Figure 8 This application is described in further detail.

[0028] The embodiment of the present application discloses a handheld external thread processing device.

[0029] Example 1, reference Figure 1 and Figure 2A 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 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, wherein the first linkage mechanism 6 converts the reciprocating rotation of the first handle 2 into a uniform circular motion of the rotating cylinder 5, and the second linkage mechanism 7 converts the holding action of the second handle 3 into a vertical feed motion of the lifting cylinder 4; the housing 1 is provided with an installation channel 12 penetrating the upper and lower sides, the rotating cylinder 5 is installed in the installation channel 12, and the diameter of both ends of the rotating cylinder 5 is greater than 2 times the diameter of the cylinder wall. The traditional process requires the operator to continuously rotate and apply pressure with both arms synchronously, which is not only labor-intensive, but also very easy to cause the thread axis to deviate due to uneven force. The device decouples the upper arm movement into the twisting operation of the palm, and the operator only needs to hold the first handle 2 naturally with both hands to reciprocate and rotate back and forth to obtain a continuous and stable rotation torque and vertical feed amount. Actual tests show that this design reduces the contact pressure fluctuation between the die 8 and the workpiece by 67%, and controls the thread center diameter error within 0.02mm. It is particularly suitable for scenarios such as pipe maintenance and field operations that have high requirements for processing accuracy and operational convenience.

[0030] refer to Figure 2 , a first bevel gear 21 is integrated and fixed at the end of the first handle 2 to transmit torque, and an arc-shaped groove 24 with the axis of rotation as the center is precisely machined on its surface. The groove forms a sliding pair with the limit block 25 on the shell 1, and accurately constrains the maximum rotation angle of the handle through mechanical hard limiting. 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 dislocation, transmission failure or structural damage caused by over-travel rotation; a pre-tightened torsion spring 23 mechanism is arranged between the first handle 2 and the shell 1: one end of the torsion spring 23 is fixed to the main body of the first handle 2, and the other end is anchored to the inner wall of the shell 1, forming a bidirectional torque effect. When the operator applies 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 resetting function of the operation, but its gradually increasing elastic resistance also provides the operator with intuitive force feedback, eliminating the operational discomfort caused by mechanical dead points and making the entire processing process smoother and more controllable.

[0031] refer to Figure 3 and Figure 4The 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 second rotating sleeve 62 moves to near the two extreme positions of the first rotating sleeve 61, the first bevel gear 21 can mesh with different half teeth 622, so that the external threads of different rotation directions can be processed without changing the rotation direction of the first handle 2. Through the cooperation between the first rotating sleeve 61 and the second rotating sleeve 62, the reciprocating rotation of the second rotating sleeve 62 is changed into the continuous unidirectional rotation of the first rotating sleeve 61.

[0032] refer to Figure 3 and Figure 4 , the first rotating sleeve 61 has a disc 611 fixedly connected at both ends, the second rotating sleeve 62 has a first ratchet disc 621 fixedly connected at both ends, the disc 611 is connected to the rotating cylinder 5 through a connecting column, the second rotating sleeve 62 is located between the two discs 611, the half teeth 622 are fixedly installed on the opposite side of the two discs 611, a plurality of first pawls 612 are rotatably connected to the disc 611, a reset spring is provided between the first pawl 612 and the disc 611, and at least one set of the first ratchet disc 621 and the first pawl 612 are in a connected state. Through the cooperation of the first ratchet disc 621 and the first pawl 612, the reciprocating rotation of the second rotating sleeve 62 is converted into the unidirectional rotation of the first rotating sleeve 61. This design enables the device to achieve unidirectional continuous rotation during operation, improving the efficiency and stability of the operation; the reciprocating rotation of the second rotating sleeve 62 can make one of the two groups of ratchet pawl structures in a meshing state at all times, so that no matter which direction the second rotating sleeve 62 rotates, the first rotating sleeve 61 can maintain unidirectional rotation. This design increases the operational flexibility of the device, allowing users to operate in different directions without worrying about the limitation of the rotation direction; since there is always a group of ratchet pawls in a meshing state, the first bevel gear 21 always remains in meshing with a half tooth 622, which makes the device easier to tap. 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 the need for complicated operating steps, which greatly simplifies the operation process of traditional tapping.

[0033] refer to 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.

[0034] 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.

[0035] 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. 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.

[0036] refer to Figure 7The shell 1 is rotatably connected to a lever 77, one end of the lever 77 abuts against the second ratchet plate 72, and the end of the lifting rod 76 is fixedly connected to the abutment block 762, and 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 shell 1, and the second ratchet plate 72 can be moved in the vertical direction, and a second spring 74 is provided between the second ratchet plate 72 and the shell 1, and the second spring 74 forces the second ratchet plate 72 to move upward. When the lever 77 is pulled, the lever 77 will drive the second ratchet plate 72 and the rotating body 78 to move downward, so that the arc plate 782 can be opened, and under the action of the third spring 761, the lifting rod 76 can be reset. When the lever 77 is released, under the action of the second spring 74, the second ratchet plate 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.

[0037] The implementation principle of a handheld external thread processing device in an embodiment of the present application is as follows: the first handle 2 transmits the operator's reciprocating rotation to the first linkage mechanism 6 through the first bevel gear 21 integrated at its end, the first linkage mechanism 6 adopts 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 the connecting column, and the rotating cylinder 5 drives the die 8 to achieve stable rotational cutting motion; the second linkage mechanism 7 transmits the rotational motion of the first handle 2 to the second ratchet disk 72 through the meshing of the second bevel gear 22 and the third bevel gear 71, the second ratchet disk 72 converts the reciprocating motion into a unidirectional rotation through the pawl mechanism, driving the rotating body 78 to rotate, the rotating body 78 engages with the threaded segment 763 of the lifting rod 76 through the internal flowering structure, converts the rotational motion into the axial movement of the lifting rod 76, and the lifting rod 76 drives the lifting cylinder 4 through the connecting block 75 to achieve vertical feed motion.

[0038] Among them, the second handle 3 pushes the second rotating sleeve 62 to produce axial displacement through the eccentric wheel 32 assembly, thereby realizing the meshing switching of the first bevel gear 21 and the half teeth 622 of different rotation directions. This design allows the operator to complete the forward and reverse switching of the rotating cylinder 5 with only one hand operation, thereby realizing the processing of external threads of different rotation directions.

[0039] The preloaded torsion spring 23 mechanism between the first handle 2 and the shell 1 provides automatic reset function and operating force feedback to ensure smooth operation and controllability. The second spring 74 between the second ratchet plate 72 and the shell 1 and the third spring 761 on the lifting rod 76 work together to ensure that each moving part can automatically reset after the operation is completed.

[0040] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A handheld external thread processing device, characterized in that: The invention 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.

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 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 disc (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 disc (72) are meshable, and the position of the third bevel gear (71) in the housing (1) remains unchanged.

7. The handheld external thread processing device according to claim 6, characterized in that: 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.

8. The handheld external thread processing device according to claim 6, 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).

9. The handheld external thread processing device according to claim 7, 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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