A walking mechanism of a full-position welding machine

Abstract

The application provides a walking mechanism of a full-position welding machine, and belongs to the technical field of pipeline welding. The walking mechanism solves the problems of the prior art, such as backlash when a driving gear meshes with a rack, low control precision and slow walking response when the full-position welding machine moves reversely, and shaking caused by gravity when the full-position welding machine runs on the top of a pipeline, which affects the running stability of the full-position welding machine. The walking mechanism comprises a walking base, a first rotating shaft and a second rotating shaft which are rotatably installed in the walking base, and a synchronization mechanism which is connected between the first rotating shaft and the second rotating shaft. A walking driving gear meshes with a rack to perform walking operation, and the second rotating shaft is driven through the synchronization mechanism. After the walking mechanism reversely walks, the walking driven gear can be more quickly abutted to the rack compared with the walking driving gear, and the walking mechanism can be driven to walk at the first time, so that the control precision and the response speed of the walking mechanism can be improved. After the backlash is reduced, the shaking can be reduced, and the running stability of the full-position welding machine can be ensured.

Description

Technical Field

[0001] This invention belongs to the field of pipeline welding technology, specifically to the traveling mechanism of an all-position welding machine. Background Technology

[0002] Pipeline all-position welding machines are mainly used in petrochemical, municipal pipeline, nuclear power engineering, shipbuilding and other fields. They are an indispensable core welding equipment, mainly used to complete 360° all-position welding operations on components such as pipelines, storage tanks, and ship hull curved surfaces.

[0003] Currently, most all-position welding machines use single-motor, single-gear drive, or dual-motor dual-gear drive for their walking mechanisms. When the drive gears of these two drive methods mesh with the track rack, there is backlash. When the all-position welding machine moves in the opposite direction, there are problems such as low control accuracy and slow walking response. Furthermore, when the all-position welding machine is running on top of the pipeline, gravity will cause vibration, affecting the stable operation of the all-position welding machine. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide a walking mechanism for an all-position welding machine. A drive mechanism drives a first rotating shaft to rotate, and a walking drive gear meshes with a rack to perform the walking operation. Simultaneously, a synchronization mechanism drives a second rotating shaft. After the walking mechanism reverses direction, the walking driven gear engages with the rack faster than the walking drive gear, thereby reducing backlash. This allows the walking mechanism to move immediately, improving its control accuracy and response speed. Reducing backlash also reduces vibration, ensuring stable operation of the all-position welding machine.

[0005] The technical solution adopted in this invention is as follows: A traveling mechanism for an all-position welding machine includes a traveling base. A first rotating shaft and a second rotating shaft are rotatably mounted on the traveling base. A traveling drive gear is fixedly sleeved on the first rotating shaft and connected to a drive mechanism. A traveling driven gear is fixedly sleeved on the second rotating shaft. A synchronization mechanism for driving the traveling driven gear and reducing backlash is connected between the first and second rotating shafts. The synchronization mechanism includes a first synchronization wheel fixedly sleeved on the first rotating shaft, and a second synchronization wheel movably sleeved on the second rotating shaft, meshing and transmitting power to the first synchronization wheel. The diameter of the first synchronization wheel is larger than the diameter of the second synchronization wheel. An elastic clamping mechanism is movably sleeved on the second rotating shaft, abutting against the end face of the second synchronization wheel and transmitting the rotational force of the second synchronization wheel to the second rotating shaft. At least two sets of side guide wheel assemblies are provided on the traveling base, one set of side guide wheel assemblies being fixed to the traveling base, and the other set of side guide wheel assemblies being connected to a sliding adjustment assembly.

[0006] Preferably, the elastic clamping mechanism includes an adjusting nut threadedly connected to the second rotating shaft, at least two sliding blocking members located between the adjusting nut and the second synchronous wheel are sleeved on the second rotating shaft, and a first elastic member is provided between the two sliding blocking members.

[0007] Preferably, a timing belt is fitted onto the first and second timing pulleys.

[0008] Preferably, the sliding adjustment component includes a groove formed on the walking base, a slider connected to the side guide wheel assembly is slidably disposed in the groove, a connecting block is provided on the side wall of the slider, a guide rod is movably passed through the connecting block, a locking push block is connected to the guide rod, a second elastic element is provided between the locking push block and the connecting block, a locking connecting rod is hinged to the locking push block, and a handle is hinged to the locking connecting rod and the handle is rotatably connected to the walking base.

[0009] Preferably, the walking base is provided with a partition for blocking the slide groove, the partition is provided with a clearance groove for avoiding the side guide wheel assembly, the partition is provided with a guide groove, and a limiting rod fixedly connected to the slider is movably arranged in the guide groove.

[0010] Preferably, the side guide wheel assembly includes a third rotating shaft, on which a side guide wheel is rotatably mounted. Stops located above and below the side guide wheel are movably sleeved on the third rotating shaft. A screw that abuts against one of the stopes is threaded onto the end face of the third rotating shaft away from the walking base. A locking nut that abuts against the other stop is threaded onto the third rotating shaft.

[0011] Preferably, the walking base is equipped with anti-collision sensing wheels.

[0012] Preferably, the drive mechanism includes a motor installed in the walking base, the output shaft of the motor is fixedly connected to a drive gear, and the drive gear meshes with a driven gear fixedly sleeved on the first rotating shaft.

[0013] Preferably, a first front guide wheel is fitted on the first rotating shaft, and a second front guide wheel is fitted on the second rotating shaft.

[0014] Preferably, the walking base is provided with a buffer block.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: The drive mechanism drives the first rotating shaft to rotate, and the walking drive gear meshes with the rack to perform the walking operation. At the same time, the second rotating shaft is driven by the synchronization mechanism. After the walking mechanism moves in the opposite direction, the walking driven gear can abut against the rack faster than the walking drive gear, thereby reducing backlash. This allows the walking mechanism to move in the first time, which can improve the control accuracy and response speed of the walking mechanism. Reducing backlash can reduce vibration and ensure the stable operation of the all-position welding machine. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the usage state provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure from a bottom view provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the bottom cross-sectional structure provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the sliding adjustment component structure provided in an embodiment of the present invention; Figure 5 A schematic diagram of the elastic clamping mechanism provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the handle in the open state provided in an embodiment of the present invention; Figure 7 for Figure 2 A schematic diagram of the AA-direction cross-sectional structure in the middle; Figure 8 This is a schematic diagram showing the usage state of the anti-collision sensing wheel provided in an embodiment of the present invention.

[0018] Reference numerals: 1-Circular track; 101-Rack; 102-Support base; 2-Traveling base; 201-Buffer block placement; 202-Side guide wheel assembly; 2021-Side guide wheel; 2022-Screw; 2023-Third shaft; 2024-Stop; 2025-Locking nut; 203-Handle; 204-Block; 205-First shaft; 206-Traveling drive gear; 207-First front guide wheel; 208-Drive gear; 209-Driven gear; 210-First synchronous pulley; 211-Synchronous belt; 212-Second synchronous pulley; 213-Avoidance groove; 214-Guide groove; 215-Walking driven gear; 216-Second rotating shaft; 217-Second front guide wheel; 218-Anti-collision sensing wheel; 219-Motor; 220-First elastic element; 221-Connecting block; 222-Guide rod; 223-Limit nut; 224-Limit rod; 225-Slide groove; 226-Slider; 227-Second elastic element; 228-Locking push block; 229-Locking connecting rod; 230-Adjusting nut; 231-Baffle; 232-Sliding blocking element. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] In the description of this invention, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0022] The following is combined with Figures 1-8 The present invention will be described in detail below.

[0023] Example: A traveling mechanism for an all-position welding machine, such as Figure 2 As shown, the device includes a walking base 2, in which a first rotating shaft 205 and a second rotating shaft 216 are rotatably mounted. A walking drive gear 206 is fixedly sleeved on the first rotating shaft 205, and a drive mechanism is connected to the first rotating shaft 205. A walking driven gear 215 is fixedly sleeved on the second rotating shaft 216, and a synchronization mechanism for driving the walking driven gear 215 to reduce backlash is connected between the first rotating shaft 205 and the second rotating shaft 216.

[0024] like Figure 1 As shown, the structure used in conjunction with the traveling mechanism also includes a ring track 1. A rack 101 is arranged in a ring on the ring track 1, and a support seat 102 is provided on the inner side of the ring track 1. The support seat 102 has a certain degree of elasticity, allowing the ring track 1 to be spaced a certain distance from the pipeline, providing space for the movement of the traveling mechanism. The drive mechanism drives the first rotating shaft 205 to rotate, and the traveling drive gear 206 meshes with the rack 101 to perform the traveling operation. At the same time, the second rotating shaft 216 is driven by the synchronization mechanism. After the traveling mechanism moves in the opposite direction, the traveling driven gear 215 can abut against the rack 101 faster than the traveling drive gear 206, thereby reducing backlash and driving the traveling mechanism to move in the first time, which can improve the control accuracy and response speed of the traveling mechanism. When the all-position welding machine runs from the top to the side of the pipeline, due to the influence of gravity and backlash, the entire all-position welding machine will vibrate. This application reduces the vibration by reducing the backlash, ensuring the stable operation of the all-position welding machine.

[0025] A first front guide wheel 207 is fitted on the first rotating shaft 205, and a second front guide wheel 217 is fitted on the second rotating shaft 216. The first front guide wheel 207 and the second front guide wheel 217 roll in contact with the surface of the circular track 1 to ensure the stability of the walking mechanism.

[0026] like Figure 2 and 3As shown, the synchronization mechanism includes a first synchronization wheel 210 fixedly sleeved on the first rotating shaft 205, and a second synchronization wheel 212 movably sleeved on the second rotating shaft 216 and meshing and drivingly connected with the first synchronization wheel 210. The diameter of the first synchronization wheel 210 is larger than the diameter of the second synchronization wheel 212. An elastic clamping mechanism is movably sleeved on the second rotating shaft 216, which abuts against the end face of the second synchronization wheel 212 and transmits the rotational force of the second synchronization wheel 212 to the second rotating shaft 216. The first synchronous pulley 210 and the second synchronous pulley 212 rotate synchronously. The diameter of the first synchronous pulley 210 is larger than that of the second synchronous pulley 212, so that the rotation speed of the second synchronous pulley 212 is faster than that of the first synchronous pulley 210. The second synchronous pulley 212 transmits the rotational force to the second rotating shaft 216 and the driven gear 215 through the frictional force applied by the elastic clamping mechanism. This allows the driven gear 215 to quickly engage with the rack 101. When the driven gear 215 engages with the rack 101, the resistance experienced by the driven gear 215 is greater than the frictional force of the elastic clamping mechanism, so the driven gear 215 remains stationary, while the second synchronous pulley 212 continues to rotate. This avoids the inconsistency in speed between the driven gear 215 and the driving gear 206, which would prevent the walking mechanism from moving.

[0027] like Figure 5 As shown, the elastic clamping mechanism includes an adjusting nut 230 threadedly connected to a second rotating shaft 216. At least two sliding blocking members 232 are sleeved on the second rotating shaft 216, located between the adjusting nut 230 and the second synchronous wheel 212. A first elastic member 220 is disposed between the two sliding blocking members 232. After the adjusting nut 230 abuts against the sliding blocking member 232, the first elastic member 220 causes the sliding blocking member 232 to abut against the end face of the second synchronous wheel 212. Under normal rotation of the second synchronous wheel 212, the frictional force between the sliding blocking member 232 and the second synchronous wheel 212 is greater than the rotational force of the second synchronous wheel 212, causing the sliding blocking member 232 to rotate synchronously with the second synchronous wheel 212, thereby driving the second rotating shaft 216 and the driven gear 215 to rotate.

[0028] The adjusting nut 230 can be turned to adjust its position, thereby adjusting the elastic force of the first elastic element 220; the first elastic element 220 is a rectangular spring. A baffle 231 is fitted onto the second rotating shaft 216, contacting both ends of the second synchronous wheel 212. The baffle 231 increases the friction area of ​​the sliding blocking element 232, allowing for better transmission of the rotational force of the second synchronous wheel 212. Screws are installed on the end face of the second rotating shaft 216. These screws can block and limit one of the baffles 231, ensuring that the second synchronous wheel 212 is better pressed against by the sliding blocking element 232. After removing the screws, the baffle 231, the second synchronous wheel 212, the sliding blocking element 232, the first elastic element 220, and the adjusting nut 230 can be disassembled and reassembled.

[0029] A timing belt 211 is fitted onto the first timing pulley 210 and the second timing pulley 212. The timing belt 211 is used to synchronously connect the first timing pulley 210 and the second timing pulley 212; alternatively, the timing belt 211 can be replaced with a gear for transmission.

[0030] At least two sets of side guide wheel assemblies 202 are provided on the walking base 2. One set of side guide wheel assemblies 202 is fixed on the walking base 2, and the other set of side guide wheel assemblies 202 is connected to a sliding adjustment assembly. The position of the side guide wheel assemblies 202 can be adjusted by the sliding adjustment assembly, thereby adjusting the distance between the two sets of side guide wheel assemblies 202, so that the walking mechanism can be clamped on the annular track 1.

[0031] like Figure 2 , 4 As shown in Figure 7, the sliding adjustment assembly includes a groove 225 formed on the walking base 2. A slider 226 connected to the side guide wheel assembly 202 is slidably disposed in the groove 225. A connecting block 221 is provided on the side wall of the slider 226. A guide rod 222 movably passes through the connecting block 221. A locking push block 228 is connected to the guide rod 222. A second elastic element 227 is provided between the locking push block 228 and the connecting block 221. A locking connecting rod 229 is hinged to the locking push block 228. A handle 203 is hinged to the locking connecting rod 229, and the handle 203 is rotatably connected to the walking base 2. Figure 6 As shown, the handle 203 is in the unlocked state, meaning that the two sets of side guide wheel assemblies 202 are not clamping the annular track 1. When it is necessary to clamp the annular track 1, the handle 203 is rotated. The handle 203 drives the locking linkage 229 to push the locking push block 228 to move, and at the same time pushes the slider 226 and one set of side guide wheel assemblies 202 to move. Until the side guide wheel assembly 202 abuts against the side wall of the annular track 1, the locking linkage 229 continues to push the locking push block 228. At this time, the second elastic element 227 is compressed. Finally, when the handle 203 is rotated to the position shown in the figure ...03 is rotated to the position shown in the figure. Figure 4 In the indicated position, the handle 203 and the locking link 229 are at an obtuse angle. After releasing the handle, the elastic force of the second elastic element 227 drives the locking link 229 to continuously rotate the handle 203. However, at this time, the handle 203 is already in contact with the walking base 2 and no longer rotates, thus achieving locking in the clamped state. The second elastic element 227 is a spring and is sleeved on the guide rod 222. A limit nut 223 is threaded onto the guide rod 222 and is located on the side of the connecting block 221 away from the second elastic element 227. The limit nut 223 can prevent the guide rod 222 from disengaging from the connecting block 221.

[0032] The walking base 2 is provided with a partition 204 for blocking the slide groove 225. The partition 204 has a clearance groove 213 for avoiding the side guide wheel assembly 202. The partition 204 also has a guide groove 214, in which a limiting rod 224 fixedly connected to the slider 226 is movably disposed. The cooperation between the guide groove 214 and the limiting rod 224 can improve the movement stability of the slider 226.

[0033] When the all-position welding machine welds pipes of different diameters, the curvature of the pipe arc is different. At this time, the first front guide wheel 207 and the second front guide wheel 217 are still in close contact with the surface of the annular track 1, but the contact surface between the side guide wheel assembly 202 and the annular track 1 is an inclined surface. When the curvature changes, the relative height between the side guide wheel assembly 202 and the traveling base 2 needs to be adjusted. Therefore, this application sets the height of the side guide wheel 2021 to be adjustable. Specifically, the side guide wheel assembly 202 includes a third rotating shaft 2023, on which the side guide wheel 2021 is rotatably mounted. Stops 2024 located above and below the side guide wheel 2021 are movably sleeved on the third rotating shaft 2023. A screw 2022 that abuts against one of the stops 24 is threadedly connected to the end face of the third rotating shaft 2023 away from the traveling base 2. A locking nut 2025 that abuts against the other stop 24 is threadedly sleeved on the third rotating shaft 2023. When height adjustment is required, first loosen screw 2022, then adjust the position of locking nut 2025 as needed, so that the side guide wheel 2021 and stop 2024 are adjusted on the third rotating shaft 2023. Finally, tighten screw 2022 to complete the adaptive adjustment for different pipe diameters.

[0034] The drive mechanism includes a motor 219 mounted in the walking base 2. The output shaft of the motor 219 is fixedly connected to a drive gear 208, which meshes with a driven gear 209 fixedly sleeved on the first rotating shaft 205. The motor 219 drives the driven gear 209 to rotate through the drive gear 208, thereby driving the first rotating shaft 205 to rotate.

[0035] The walking base 2 is equipped with anti-collision sensing wheels 218. The anti-collision sensing wheels 218 are located at the front or rear end of the walking base 2. The anti-collision sensing wheels 218 can pre-contact obstacles. The anti-collision sensing wheels 218 are limit switches with a certain tilt angle and can swing. The limit switch sends a signal to control the motor 219, and the all-position welding machine immediately stops operating. For example... Figure 8 As shown, the anti-collision sensing wheel 218 can stop moving after it comes into contact with another walking mechanism.

[0036] The walking base 2 is provided with a buffer block 201 that protrudes from other structures. The buffer block 201 provides support for the entire walking mechanism and prevents other structures from hitting the ground.

[0037] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A walking mechanism for an all-position welding machine, comprising a walking base (2), wherein a first rotating shaft (205) and a second rotating shaft (216) are rotatably mounted in the walking base (2), a walking drive gear (206) is fixedly sleeved on the first rotating shaft (205), a drive mechanism is connected to the first rotating shaft (205), and a walking driven gear (215) is fixedly sleeved on the second rotating shaft (216), characterized in that, A synchronization mechanism for reducing backlash in driving the driven gear (215) is connected between the first rotating shaft (205) and the second rotating shaft (216). The synchronization mechanism includes a first synchronous wheel (210) fixedly sleeved on the first rotating shaft (205), and a second synchronous wheel (212) movably sleeved on the second rotating shaft (216) and meshing with the first synchronous wheel (210). The diameter of the first synchronous wheel (210) is larger than the diameter of the second synchronous wheel (212). A part of the second rotating shaft (216) abuts against the end face of the second synchronous wheel (212) and transmits the rotational force of the second synchronous wheel (212) to the second rotating shaft. (216) elastic clamping mechanism; the walking base (2) is provided with at least two sets of side guide wheel assemblies (202), one set of side guide wheel assemblies (202) is fixed on the walking base (2), and the other set of side guide wheel assemblies (202) is connected to a sliding adjustment assembly; the elastic clamping mechanism includes an adjusting nut (230) threadedly connected to the second rotating shaft (216), and at least two sliding blocking members (232) located between the adjusting nut (230) and the second synchronous wheel (212) are sleeved on the second rotating shaft (216), and a first elastic member (220) is provided between the two sliding blocking members (232).

2. The traveling mechanism of an all-position welding machine according to claim 1, characterized in that, The first synchronous pulley (210) and the second synchronous pulley (212) are fitted with a synchronous belt (211).

3. The traveling mechanism of an all-position welding machine according to claim 1, characterized in that, The sliding adjustment assembly includes a slide groove (225) on the walking base (2), a slider (226) connected to the side guide wheel assembly (202) is slidably arranged in the slide groove (225), a connecting block (221) is provided on the side wall of the slider (226), a guide rod (222) is movably passed through the connecting block (221), a locking push block (228) is connected to the guide rod (222), a second elastic element (227) is provided between the locking push block (228) and the connecting block (221), a locking connecting rod (229) is hinged to the locking push block (228), a handle (203) is hinged to the locking connecting rod (229), and the handle (203) is rotatably connected to the walking base (2).

4. The traveling mechanism of an all-position welding machine according to claim 3, characterized in that, The walking base (2) is provided with a partition (204) for blocking the slide groove (225), and a clearance groove (213) for avoiding the side guide wheel assembly (202) is provided on the partition (204). A guide groove (214) is provided on the partition (204), and a limiting rod (224) fixedly connected to the slider (226) is movably provided in the guide groove (214).

5. The traveling mechanism of an all-position welding machine according to claim 1, characterized in that, The side guide wheel assembly (202) includes a third rotating shaft (2023), on which a side guide wheel (2021) is rotatably mounted. Stops (2024) located above and below the side guide wheel (2021) are movably sleeved on the third rotating shaft (2023). A screw (2022) that abuts against one of the stops (2024) is threaded on the end face of the third rotating shaft (2023) away from the walking base (2). A locking nut (2025) that abuts against the other stop (2024) is threaded on the third rotating shaft (2023).

6. The traveling mechanism of an all-position welding machine according to claim 1, characterized in that, The walking base (2) is equipped with anti-collision sensing wheels (218).

7. The traveling mechanism of an all-position welding machine according to claim 1, characterized in that, The drive mechanism includes a motor (219) installed in the walking base (2), and the output shaft of the motor (219) is fixedly connected to a drive gear (208), and the drive gear (208) meshes with a driven gear (209) fixedly sleeved on the first rotating shaft (205).

8. The traveling mechanism of an all-position welding machine according to claim 1, characterized in that, The first rotating shaft (205) is fitted with a first front guide wheel (207), and the second rotating shaft (216) is fitted with a second front guide wheel (217).

9. The traveling mechanism of an all-position welding machine according to claim 1, characterized in that, The walking base (2) is provided with a buffer block (201).

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