Hand-operated rotary positioner

Abstract

This utility model relates to a hand-cranked rotary positioner, which includes an auxiliary positioning mechanism mounted on a mounting frame. A rotating mechanism is connected to the bottom of one end of the mounting frame via a transmission. A three-jaw chuck for fixing workpiece one is mounted on the output end of the rotating mechanism. A welding positioning assembly is mounted on the rotating mechanism, and a welding torch is mounted on the welding positioning assembly. This utility model supports the welding of workpiece one through the auxiliary positioning mechanism. The swing angle of the three-jaw chuck and workpiece one can be adjusted by a hand-cranked reducer, ensuring a tight fit between workpiece one and workpiece two located below it, preventing misalignment. This achieves high welding efficiency, good welding effect, high yield, and low welding cost. It solves the problems of inaccurate flange and pipe positioning, poor welding efficiency, low yield, and high welding processing cost associated with current methods of welding flange and pipe joints by rotating the welding torch around the flange for ring welding or by fixing the welding torch but rotating the flange and pipe.

Description

Technical Field

[0001] This utility model relates to the field of positioners, and more particularly to a hand-cranked rotary positioner. Background Technology

[0002] When welding flanges and pipes, ensuring a tight fit between them is crucial for welding quality. One welding method involves rotating the welding torch around the flange for circumferential welding. However, this process can easily lead to misalignment if the torch touches the flange or pipe. Another method involves keeping the welding torch stationary while rotating the flange and pipe to weld the joint. However, this method also risks the torch touching the flange and pipe if their centers are not aligned correctly, resulting in misalignment and inaccurate positioning. This leads to poor welding quality, low yield, and high welding costs. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a hand-cranked rotary positioner.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: the hand-cranked rotary positioner includes a mounting frame, on which an auxiliary positioning mechanism for supporting and positioning workpiece one is mounted. A rotating mechanism is drivenly connected to the bottom of one end of the mounting frame. A three-jaw chuck for fixing workpiece one is mounted on the output end of the rotating mechanism. A welding positioning assembly is mounted on the rotating mechanism. A welding torch for welding workpiece one and workpiece two is mounted on the welding positioning assembly.

[0005] Preferably, the rotating mechanism includes a mounting box, a rotating drive device, a mounting base, a rotating shaft, a transmission assembly, a first bearing, and a second bearing. The mounting base is installed inside the mounting box, the rotating drive device is installed on the mounting base, the first bearing and the second bearing are respectively installed on the top and bottom of the mounting base, and the first bearing and the second bearing are respectively sleeved on the two ends of the rotating shaft. The rotating drive device is connected to the rotating shaft through the transmission assembly, and the lower end of the rotating shaft is connected and installed to a three-jaw chuck.

[0006] Preferably, a hand-cranked reducer is installed at the bottom of one end of the mounting bracket, a first support shaft is installed on one side of the rotating mechanism, the hand-cranked reducer is connected to the first support shaft, a second support shaft is installed at the bottom of the other end of the mounting bracket, a third bearing is installed on the other side of the rotating mechanism, and the third bearing is sleeved on the second support shaft.

[0007] Preferably, the auxiliary positioning mechanism includes an auxiliary positioning frame movably mounted on the mounting frame, an auxiliary positioning plate is mounted on one end of the auxiliary positioning frame and the auxiliary positioning plate is perpendicular to the auxiliary positioning frame, and a first support positioning component and a second support positioning component are oscillatingly mounted on one side of the auxiliary positioning plate and the first support positioning component and the second support positioning component oscillate toward each other.

[0008] Specifically, the auxiliary positioning plate has a first annular groove and a second annular groove on its two ends, and the first annular groove and the second annular groove are arranged in a mirror symmetrical manner; the first support positioning assembly includes a first positioning rod, a first mounting sleeve, a first positioning bolt, a support guide wheel, a first bolt assembly and a second bolt assembly. One end of the first mounting sleeve is rotatably connected to the auxiliary positioning plate through the first bolt assembly, the second bolt assembly is installed on the other end of the first mounting sleeve, the first positioning rod is movably installed in the first mounting sleeve, the first positioning bolt is threadedly connected to the first mounting sleeve and used to lock the first positioning rod in the first mounting sleeve, and the support guide wheel is rotatably installed on the swing end of the first positioning rod; The structure of the second support positioning component is mirror-symmetrical to that of the first support positioning component. The second bolt assembly of the first support positioning component is adapted to the first annular groove for installation, and the first mounting sleeve of the first support positioning component is angularly positioned by the second bolt assembly of the first support positioning component. The first mounting sleeve of the first support positioning component is locked and positioned by the first positioning bolt of the first support positioning component to lock the extension length of the first positioning rod. The second bolt assembly of the second support positioning component is adapted to the second annular groove for installation, and the first mounting sleeve of the second support positioning component is angularly positioned by the second bolt assembly of the second support positioning component. The first mounting sleeve of the second support positioning component is locked and positioned by the first positioning bolt of the second support positioning component to lock the extension length of the first positioning rod of the second support positioning component.

[0009] Preferably, the auxiliary positioning frame includes a second positioning rod and a connecting rod, the connecting rod being vertically connected to the second positioning rod, and rotatable positioning guide wheels being installed at both ends of the connecting rod; The mounting bracket is provided with a second mounting sleeve, the second positioning rod is movably installed in the second mounting sleeve, and the second mounting sleeve is screwed with a second positioning bolt. The second mounting sleeve is provided at least once, and the second positioning rod is provided at least once.

[0010] Preferably, a controller or control system is provided for signal control of components such as the rotating mechanism and the welding torch. The controller is a PLC programmable logic controller. The PLC programmable logic controller can be a programmable logic controller of model XDS-40T-D, but is not limited thereto.

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: 1. By installing a hand-cranked reducer at the bottom of one end of the mounting frame, a rotating mechanism connected to the bottom of one end of the mounting frame, and a three-jaw chuck installed at the output end of the rotating mechanism, the swing angle of the three-jaw chuck and workpiece one (flange) can be adjusted by the hand-cranked reducer, so that workpiece one and workpiece two located below it can not only achieve tight, precise and stable docking, but it is also suitable for precise docking of two workpieces with a certain angle on the docking surface, and has strong versatility; at the same time, workpiece one (flange) and workpiece two (pipe) can be rotated by the rotating mechanism, so as to achieve circumferential welding at the joint of workpiece one and workpiece two without moving the welding torch, and the welding effect is good.

[0012] 2. By installing an auxiliary positioning mechanism on the mounting frame and designing the structure of the auxiliary positioning mechanism, the welding support of workpiece one can be adjusted through the auxiliary positioning mechanism. This avoids misalignment of the welding torch during the welding of workpiece one (flange) and workpiece two (pipe), ensuring accurate docking of workpiece one and workpiece two and improving the welding quality of workpiece one and workpiece two. When the auxiliary positioning mechanism is used in conjunction with components such as a hand-cranked reducer and a rotating mechanism, the welding of workpiece one and workpiece two has the advantages of high welding efficiency, good welding effect, high yield, and low welding cost. It effectively solves the problems of inaccurate positioning of flange and pipe, poor welding efficiency, low yield, and high welding processing cost caused by the current method of welding the flange and pipe joint by rotating the welding torch around the flange or by fixing the welding torch but rotating the flange and pipe. Attached Figure Description

[0013] For ease of explanation, the present invention will be described in detail below with reference to the preferred embodiments and accompanying drawings.

[0014] Figure 1 This is a perspective view of the hand-cranked rotary positioner of this utility model.

[0015] Figure 2 This is a perspective view of the rotating mechanism of the hand-cranked rotary positioner of this utility model.

[0016] Figure 3 This is an assembly perspective view of the rotary drive device, mounting base, and rotary components of the hand-cranked rotary positioner of this utility model.

[0017] Figure 4 This is a perspective view of the assembly of the mounting frame, rotating mechanism, first support shaft, second support shaft, and hand-cranked reducer of the hand-cranked rotary positioner of this utility model.

[0018] Figure 5 This is a perspective view of the auxiliary positioning mechanism of the hand-cranked rotary positioner of this utility model.

[0019] Figure 6 This utility model relates to a hand-cranked rotary positioner. Figure 5 3D images from different angles.

[0020] Figure 7 This is a perspective view of the assembly of the mounting frame, second mounting sleeve, first support shaft, second support shaft and hand-cranked reducer of the hand-cranked rotary positioner of this utility model.

[0021] Figure 8 This is a perspective view of the disassembly and installation frame, auxiliary positioning mechanism and hand-cranked reducer of the hand-cranked rotary positioner of this utility model. Detailed Implementation

[0022] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0024] Reference Figure 1 As shown, the hand-cranked rotary positioner of this utility model includes a mounting frame 1. The mounting frame 1 is equipped with an auxiliary positioning mechanism 2 for supporting and positioning workpiece 1. A rotary mechanism 3 is connected to the bottom of one end of the mounting frame 1. A three-jaw chuck 4 for fixing workpiece 1 is installed on the output end of the rotary mechanism 3. A welding positioning assembly 5 is installed on the rotary mechanism 3. A welding torch 6 for welding workpiece 1 and workpiece 2 is installed on the welding positioning assembly 5.

[0025] Reference Figure 2 and Figure 3As shown, the rotating mechanism 3 includes a mounting box 31, a rotating drive device 32, a mounting base 33, a rotating shaft 34, a transmission assembly 35, a first bearing 36, and a second bearing 37. The mounting base 33 is installed inside the mounting box 31, and the rotating drive device 32 is installed on the mounting base 33. The first bearing 36 and the second bearing 37 are respectively installed on the top and bottom of the mounting base 33. The first bearing 36 and the second bearing 37 are respectively sleeved on the two ends of the rotating shaft 34. The rotating drive device 32 is connected to the rotating shaft 34 through the transmission assembly 35. The lower end of the rotating shaft 34 is connected and installed to the three-jaw chuck 4. The rotating shaft 34, the transmission assembly 35, the first bearing 36, and the second bearing 37 constitute the rotating assembly 38.

[0026] In this embodiment, the transmission assembly 35 includes two sprockets and a chain. One sprocket is mounted on the output end of the rotary drive device 32, and the other sprocket is sleeved on the rotating shaft 34. The two sprockets are connected by a chain drive. The rotary drive device 32 drives the rotating shaft 34 to rotate via the two sprockets and the chain, which in turn drives the three-jaw chuck 4 to rotate. The three-jaw chuck 4 holds the workpiece, ultimately driving the workpiece to rotate. The three-jaw chuck 4 is a commonly used component in mechanical design, and its specific structure and working principle are common knowledge, so they will not be explained in detail here. The rotary drive device 32 is preferably configured as a motor.

[0027] Reference Figure 1 , Figure 2 , Figure 4 , Figure 7 and Figure 8 As shown, a hand-cranked reducer 7 is installed at the bottom of one end of the mounting frame 1, and a first support shaft 81 is installed on one side of the rotating mechanism 3. The hand-cranked reducer 7 is connected to the first support shaft 81 in a transmission connection. A second support shaft 82 is installed at the bottom of the other end of the mounting frame 1, and a third bearing 9 is installed on the other side of the rotating mechanism 3. The third bearing 9 is sleeved on the second support shaft 82.

[0028] By adopting the above technical solution, the rotating mechanism 3 rotates between the hand-cranked reducer 7 and the second support shaft 82 via the first support shaft 81 and the third bearing 9 respectively. When the rocker arm of the hand-cranked reducer 7 is cranked, the first support shaft 81 is driven to rotate. The first support shaft 81 drives the rotating mechanism 3 to rotate around it. The rotating mechanism 3 drives the three-jaw chuck 4 to swing to adjust the positioning angle of the workpiece 1 on the three-jaw chuck 4, and finally adjusts the welding positioning angle of the workpiece 1.

[0029] Reference Figure 5 and Figure 6As shown, the auxiliary positioning mechanism 2 includes an auxiliary positioning frame 21 movably mounted on the mounting bracket 1. An auxiliary positioning plate 22 is mounted on one end of the auxiliary positioning frame 21, and the auxiliary positioning plate 22 is perpendicular to the auxiliary positioning frame 21. A first support positioning component 23 and a second support positioning component 24 are oscillatingly mounted on one side of the auxiliary positioning plate 22, and the first support positioning component 23 and the second support positioning component 24 oscillate towards each other. A first annular groove 25 and a second annular groove 26 are respectively provided on the two ends of the auxiliary positioning plate 22, and the first annular groove 25 and the second annular groove 26 are arranged in a mirror symmetrical manner. The first support positioning assembly 23 includes a first positioning rod 231, a first mounting sleeve 232, a first positioning bolt 233, a support guide wheel 234, a first bolt assembly 235, and a second bolt assembly 236. One end of the first mounting sleeve 232 is rotatably connected to the auxiliary positioning plate 22 via the first bolt assembly 235. The second bolt assembly 236 is mounted on the other end of the first mounting sleeve 232. The first positioning rod 231 is movably mounted inside the first mounting sleeve 232. The first positioning bolt 233 is threaded onto the first mounting sleeve 232 and is used to lock the first positioning rod 231 inside the first mounting sleeve 232. The support guide wheel 234 is rotatably mounted on the swing end of the first positioning rod 231. The structure of the second support positioning assembly 24 is mirror-symmetrical to the mechanism of the first support positioning assembly 23. The second bolt assembly of the first support positioning assembly 23... The first mounting sleeve 232 of the first support positioning component 23 is fitted and installed in the first annular groove 25, and the first mounting sleeve 232 of the first support positioning component 23 is angularly positioned by the second bolt assembly 236 of the first support positioning component 23. The first mounting sleeve 232 of the first support positioning component 23 locks and positions the extension length of the first positioning rod 231 by the first positioning bolt 233 of the first support positioning component 23. The second bolt assembly 236 of the second support positioning component 24 is fitted and installed in the second annular groove 26, and the first mounting sleeve 232 of the second support positioning component 24 is angularly positioned by the second bolt assembly 236 of the second support positioning component 24. The first mounting sleeve 232 of the second support positioning component 24 locks and positions the extension length of the first positioning rod 231 of the second support positioning component 24 by the first positioning bolt 233 of the second support positioning component 24.

[0030] In this embodiment, both the first bolt assembly 235 and the second bolt assembly 236 are provided with a screw and a nut. In the first bolt assembly 235, one end of the screw is connected to the first mounting sleeve 232, and the screw moves through the auxiliary positioning plate 22. The nut is screwed to the screw to rotate the first mounting sleeve 232 onto the auxiliary positioning plate 22. In the second bolt assembly 236, one end of the screw is connected to the first mounting sleeve 232, and the screw moves through the first annular groove 25 or the second annular groove 26. The nut is screwed to the screw and locked to lock the swing angle of the first mounting sleeve 232 of the first support positioning assembly 23 and the second support positioning assembly 24.

[0031] By adopting the above technical solution, the second support positioning component 24 and the first support positioning component 23 respectively adjust the swing angle of their respective first positioning rods 231, and lock the swing angle through their respective second bolt components 236. After the second support positioning component 24 and the first support positioning component 23 respectively adjust the extension or shortening of their respective first positioning rods 231 to the length required for production or processing, their respective first positioning bolts 233 can lock and position their respective extended and shortened first positioning rods 231, so that their respective support guide wheels 234 can weld and support circular workpieces, and can weld and support circular workpieces of different sizes, ensuring welding accuracy and good welding effect.

[0032] Reference Figure 6 and Figure 7 As shown, the auxiliary positioning frame 21 includes a second positioning rod 211 and a connecting rod 212. The connecting rod 212 is vertically connected to the second positioning rod 211, and rotatable positioning guide wheels 213 are respectively installed at both ends of the connecting rod 212. The mounting frame 1 is provided with a second mounting sleeve 10, and the second positioning rod 211 is movably installed in the second mounting sleeve 10. A second positioning bolt 11 is screwed onto the second mounting sleeve 10. At least one second mounting sleeve 10 is provided, and at least one second positioning rod 211 is provided.

[0033] By adopting the above technical solution, the second mounting sleeve 10 locks and positions the second positioning rod 211 after the telescopic adjustment length by the second positioning bolt 11, so that the first support positioning component 23 and the second support positioning component 24 can reach the surface of the workpiece of different size to achieve welding support.

[0034] In this embodiment, refer to Figure 8As shown, the welding positioning assembly 5 includes at least one mounting clip 51, a first fixing clip 52, a second fixing clip 53, a first connecting rod 54, and a second connecting rod 55. The first connecting rod 54 is vertically mounted on the side of the mounting box 31 through at least one mounting clip 51. The first fixing clip 52 is sleeved on the first connecting rod 54. One end of the second connecting rod 55 is vertically mounted to the first connecting rod 54 through the first fixing clip 52. The welding torch 6 is mounted on the other end of the second connecting rod 55 through the second fixing clip 53.

[0035] Reference Figures 1 to 8 As shown, when this hand-cranked rotary positioner is working, it can support and adjust the welding of a circular workpiece (such as a flange) through the auxiliary positioning mechanism 2. By cranking the hand-cranked reducer 7, the swing angle of the three-jaw chuck 4 and the circular workpiece 1 held by the three-jaw chuck 4 can be adjusted, so that the circular workpiece 1 can be more tightly and securely connected with the tubular workpiece 2 (such as a pipe) positioned below it, thus achieving the purpose of precise and stable connection. When the rotary mechanism 3 drives the three-jaw chuck 4 to rotate, it can rotate the circular workpiece 1 held by the three-jaw chuck 4 and the tubular workpiece 2 (such as a pipe) that is tightly connected with it, so that the joint of the circular workpiece 1 and the tubular workpiece 2 can be welded without moving the welding torch 6. In ring rail welding, the auxiliary positioning mechanism 2 supports the welding of the circular workpiece 1, preventing misalignment between the circular workpiece 1 and the tubular workpiece 2 during the welding process. This ensures precise docking between the circular workpiece 1 and the tubular workpiece 2, thereby improving the welding quality. The overall structural design has the advantages of high welding efficiency, good welding effect, high yield, and low welding cost. It solves the problems of inaccurate positioning of flanges and pipes, poor welding efficiency, low yield, and high welding processing cost that currently exist in ring rail welding by rotating the welding torch around the flange or in welding the flange and pipe joint by fixing the welding torch but rotating the flange and pipe.

[0036] The above embodiments are merely examples of this utility model and are not intended to limit the implementation and scope of this utility model. All technical solutions that are the same as or equivalent to the contents described in the claims of this utility model should be included within the protection scope of this utility model.

Claims

1. A hand-cranked rotary positioner, including a mounting frame, characterized in that: The mounting frame is equipped with an auxiliary positioning mechanism for supporting and positioning workpiece one. A rotating mechanism is connected to the bottom of one end of the mounting frame. A three-jaw chuck for fixing workpiece one is installed on the output end of the rotating mechanism. A welding positioning assembly is installed on the rotating mechanism. A welding torch for welding workpiece one and workpiece two is installed on the welding positioning assembly.

2. The hand-cranked rotary positioner according to claim 1, characterized in that: The rotating mechanism includes a mounting box, a rotating drive device, a mounting base, a rotating shaft, a transmission assembly, a first bearing, and a second bearing. The mounting base is installed inside the mounting box, the rotating drive device is installed on the mounting base, the first bearing and the second bearing are respectively installed on the top and bottom of the mounting base, and the first bearing and the second bearing are respectively sleeved on the two ends of the rotating shaft. The rotating drive device is connected to the rotating shaft through the transmission assembly, and the lower end of the rotating shaft is connected and installed to a three-jaw chuck.

3. The hand-cranked rotary positioner according to claim 1, characterized in that: A hand-cranked reducer is installed at the bottom of one end of the mounting frame, and a first support shaft is installed on one side of the rotating mechanism. The hand-cranked reducer is connected to the first support shaft in a transmission manner. A second support shaft is installed at the bottom of the other end of the mounting frame, and a third bearing is installed on the other side of the rotating mechanism. The third bearing is sleeved on the second support shaft.

4. The hand-cranked rotary positioner according to claim 1, characterized in that: The auxiliary positioning mechanism includes an auxiliary positioning frame movably mounted on the mounting frame. An auxiliary positioning plate is mounted on one end of the auxiliary positioning frame and is perpendicular to the auxiliary positioning frame. A first support positioning component and a second support positioning component are oscillatingly mounted on one side of the auxiliary positioning plate and oscillating towards each other.

5. The hand-cranked rotary positioner according to claim 4, characterized in that: The auxiliary positioning plate has a first annular groove and a second annular groove at its two ends, and the first annular groove and the second annular groove are arranged in a mirror symmetrical manner. The first support positioning assembly includes a first positioning rod, a first mounting sleeve, a first positioning bolt, a support guide wheel, a first bolt assembly, and a second bolt assembly. One end of the first mounting sleeve is rotatably connected to the auxiliary positioning plate through the first bolt assembly. The second bolt assembly is installed on the other end of the first mounting sleeve. The first positioning rod is movably installed inside the first mounting sleeve. The first positioning bolt is threaded onto the first mounting sleeve and is used to lock the first positioning rod inside the first mounting sleeve. The support guide wheel is rotatably installed on the swing end of the first positioning rod. The structure of the second support positioning component is mirror-symmetrical to the mechanism of the first support positioning component. The second bolt component of the first support positioning component is adapted to the first annular groove for installation. The first mounting sleeve of the first support positioning component is angularly positioned by the second bolt component of the first support positioning component. The first mounting sleeve of the first support positioning component is locked and positioned by the first positioning bolt of the first support positioning component to lock the extension length of the first positioning rod. The second bolt assembly of the second support positioning component is adapted to the second annular groove for installation, and the first mounting sleeve of the second support positioning component is angularly positioned by the second bolt assembly of the second support positioning component. The first mounting sleeve of the second support positioning component is locked and positioned by the first positioning bolt of the second support positioning component to lock the extension length of the first positioning rod of the second support positioning component.

6. The hand-cranked rotary positioner according to claim 5, characterized in that: The auxiliary positioning frame includes a second positioning rod and a connecting rod. The connecting rod is perpendicularly connected to the second positioning rod, and rotatable positioning guide wheels are respectively installed at both ends of the connecting rod. The mounting bracket is provided with a second mounting sleeve, the second positioning rod is movably installed in the second mounting sleeve, and the second mounting sleeve is screwed with a second positioning bolt. The second mounting sleeve is provided at least once, and the second positioning rod is provided at least once.

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