High-precision welding structure

Abstract

The utility model discloses a high-precision welding structure which comprises a conveying rack, a conveying guide part is arranged in the conveying rack and comprises an installation frame plate arranged on the conveying rack, a plurality of movable balls are movably installed in the installation frame plate, a lateral plate is arranged on one side of the conveying rack, and a plurality of clamping grooves are formed in the lateral plate. A mounting table is arranged on the other side of the conveying rack, a welding robot is arranged on the mounting table, the welding robot comprises a bottom adjusting and positioning structure, a movable ball comprises two semicircular pieces making contact with the mail cabinet, a driven gear is connected between the two semicircular pieces, and the outer diameter of the driven gear is equal to that of the semicircular pieces; the bottom adjusting and positioning structure comprises guiding pieces arranged on the outer sides of the two semicircular pieces, the semicircular pieces rotate in the moving direction of the mail cabinet under the guiding of the guiding pieces, an adjusting piece is arranged at the bottom of the driven gear, welding can be accurately conducted at the preset position in the welding process, and therefore the strength and attractiveness of a cabinet body are guaranteed.

Description

Technical Field

[0001] This utility model relates to a cabinet welding structure, and more particularly to a high-precision welding structure. Background Technology

[0002] Mail lockers are mainly used to store and manage mail, letters, and small parcels. They are a service provided by post offices or property management companies. They are usually designed as large lockers that can accommodate letters and parcels of different sizes. Mail lockers are generally shipped in batches, with very few individual orders. Therefore, the welding process is carried out in an assembly line manner, with different units welded in different positions, thereby improving the overall production line efficiency.

[0003] Traditionally, mail cabinets are welded using overhead cranes to move them to various workstations. While this method can lift heavy mail cabinets, manual guidance and correction are still required when they are placed on the ground. Therefore, existing technology uses guide wheels on the production line frame to place the mail cabinets on these wheels. The crane moves the mail cabinets forward, causing the mail wheels to move along the guide wheels, thus completing the workstation switch. This method allows the industry to move the cabinets without vertical movement. However, because the parameters of the welding robot are set to be constant, although this method of moving and placing the cabinets achieves horizontal movement, it cannot form an effective fixation during welding. This can easily lead to unilateral deviation during welding, which slows down the overall welding progress. Utility Model Content

[0004] This invention provides a high-precision welding structure that not only allows the mail cabinet to be assisted in sliding to the corresponding area via a slider, but also allows it to be fixed in place after fine-tuning its position. This enables precise welding at predetermined positions during welding, ensuring the strength and aesthetics of the cabinet and effectively solving the aforementioned problems.

[0005] This utility model is implemented as follows:

[0006] A high-precision welding structure includes a transfer frame, a transfer guide component within the transfer frame, and a mounting plate mounted on the transfer frame. A plurality of movable balls are movably mounted within the mounting plate. A lateral plate is located on one side of the transfer frame, and a mounting platform is located on the other side of the transfer frame. A welding robot is mounted on the mounting platform.

[0007] The bottom adjustment and positioning structure includes a movable ball comprising two semicircular pieces that contact the mail cabinet. A driven gear connects the two semicircular pieces, and the outer diameter of the driven gear is equal to the outer diameter of the semicircular pieces. The bottom adjustment and positioning structure includes guide members disposed on the outer sides of the two semicircular pieces. The semicircular pieces rotate in the direction of movement of the mail cabinet under the guidance of the guide members. An adjustment member is disposed at the bottom of the driven gear. When the adjustment member moves upward, it drives the driven gear to reverse, causing the movable ball to return the mail cabinet to a predetermined position. A positioning member is disposed on the side of the driven gear. When the driven gear is in position, the positioning member is locked in the driven gear, fixing the movable ball and thus fixing the entire mail cabinet in place.

[0008] As a further improvement, the guide includes a mounting plate connected to the upper plate of the transmission frame, with two fixing pins disposed below the mounting plate, and a through hole opened on the side of the semicircular plate away from the driven gear, and the fixing pins are inserted into the through hole of the driven gear.

[0009] As a further improvement, the adjusting member includes a driving gear located below the driven gear, and a booster assembly is provided below the driving gear. A detection structure is provided on the upper plate of the transmission frame. When the detection structure detects that the mail cabinet is not in place, it drives the driving gear and the booster assembly to move upward, and the booster assembly drives the driving gear to rotate, thereby causing the driven gear to rotate clockwise or counterclockwise.

[0010] As a further improvement, the booster assembly includes a rotating motor that passes through the drive gear. The output end of the rotating motor is supported by a support base. The bottom of the rotating motor and the support base are both connected to a synchronously lifting hydraulic cylinder. All the hydraulic cylinders are mounted on a base plate.

[0011] As a further improvement, the outer side of the drive gear is provided with several alignment holes.

[0012] As a further improvement, the positioning element includes limiting rods located at the bottom corners on both sides of the driven gear. The limiting rods are driven by a limiting cylinder, which is electrically connected to the detection structure.

[0013] The beneficial effects of this utility model are:

[0014] In existing welding production lines, either sliding transport or tooling fixation is used, which is either inconvenient for fixing during welding or for transferring after welding. Therefore, this utility model, by adding a bottom adjustment and positioning structure, firstly changes the traditional design of the movable ball, making it a three-section design. This allows it to be set up to cooperate with external structures without affecting the turnover effect. When the movable ball transports the mail cabinet to the vicinity of the predetermined position, if the position of the mail cabinet is still slightly off, the entire driven gear can be retracted through the adjustment component, so that the movable ball can drive the mail cabinet back or forward, so that the mail cabinet reaches the designated position. This allows the robot with the preset welding trajectory to weld more accurately. After the mail cabinet reaches the designated position, the entire movable ball is fixed by the positioning component. Combined with the meshing effect of the adjustment component and the driven gear, the mail cabinet is more stable during the welding process and will not slip due to the action of the robot arm.

[0015] In the process of the moving ball's movement, compared to the disordered movement of traditional balls, if the moving ball's direction of movement is also disordered, it will be difficult to adjust its direction and fix it. Therefore, the moving ball of this utility model has a fixed direction of movement. The semicircular piece that makes up the moving ball is fixed to the mounting plate by a fixing pin, so that the moving ball moves along the direction of rotation of the semicircular piece, which also happens to match the direction of travel of the mail cabinet, thus facilitating the setting of adjustment and positioning components.

[0016] As the mail cabinet moves, it comes into contact with the movable ball, which rotates a corresponding number of times. Therefore, the position of the mail cabinet is constantly being monitored. If the mail cabinet stops before reaching the predetermined position, it needs to be finely adjusted by the adjusting component. This raises the adjusting component and engages with the stopped driven gear, which then drives the driven gear to rotate. This causes the movable ball to move the mail cabinet forward or backward, allowing it to reach the designated area and cooperate with the welding robot that has been programmed with a pre-set trajectory.

[0017] During the upward movement of the entire booster assembly, the rotating motor and the drive gear cannot be pushed upwards alone, otherwise it is easy to cause unilateral instability or even breakage of the motor output shaft. Therefore, this utility model sets a support seat at the position of the rotating motor corresponding to the booster assembly. By synchronously pushing the support seat, the entire upward pushing process becomes more stable and can provide sufficient support and stability during meshing rotation.

[0018] After the mail cabinet reaches the designated position, welding work needs to begin. However, the bottom of the mail cabinet is still in a state of sliding friction at this time, and there is a certain probability of slippage during welding. Therefore, in order to improve welding stability, this utility model sets an alignment hole on the drive gear and sets a limit rod driven by a limit cylinder on the positioning component. The limit rod tightly clamps the drive gear, preventing it from sliding. In turn, the drive gear restricts the driven gear, fixing all the movable balls with driven gears. This achieves the effect of being able to slide before and after welding and being fixed during welding. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a top view of the structure of this utility model.

[0022] Figure 3 This is a front view structural diagram of this utility model.

[0023] Figure 4 This is a three-dimensional structural diagram of the present invention (single workstation).

[0024] Figure 5 This is a utility model Figure 4 A magnified view of region A in the middle.

[0025] Figure 6 This is a utility model Figure 4 A structural diagram from another angle.

[0026] Figure 7 This is a utility model Figure 6 A magnified view of region B in the middle.

[0027] Figure 8 This is a schematic diagram of the side-end limiting structure of this utility model.

[0028] Figure 9 This is a schematic diagram of the bottom adjustment and positioning structure of this utility model.

[0029] Figure 10 This is a utility model Figure 9 A frontal view of the structure.

[0030] Figure 11 This is a schematic diagram of the alignment hole in the drive gear (in the positive position).

[0031] Figure 12 This is a schematic diagram of the alignment hole in the drive gear (misaligned state).

[0032] Figure 13 This is a structural schematic diagram of the bottom limiting component of this utility model. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0034] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] Reference Figures 1 to 13As shown, a high-precision welding structure includes a transmission frame 10, in which a transmission guide 20 is provided. The transmission guide 20 includes a mounting plate 21 mounted on the transmission frame 10, and a plurality of movable balls 22 are movably mounted within the mounting plate 21. A lateral plate 30 is provided on one side of the transmission frame 10, and a mounting platform 40 is provided on the other side of the transmission frame 10. A welding robot is mounted on the mounting platform 40. The structure also includes a bottom adjustment and positioning structure 50. Each movable ball 22 includes two semicircular pieces 221 that contact the mail cabinet. A driven gear 222 is connected between the two semicircular pieces 221. The outer diameter of the driven gear 222 is equal to the outer diameter of the semicircular pieces 221. The bottom adjustment and positioning structure 50 includes a guide 51 located outside the two semicircular pieces 221. The semicircular pieces 221 rotate in the direction of movement of the mail cabinet under the guidance of the guide 51. An adjusting member 52 is provided at the bottom of gear 222. When the adjusting member 52 moves upward, it drives the driven gear 222 to reverse, causing the movable ball 22 to return the mail cabinet to a predetermined position. A positioning member 53 is provided on the side of the driven gear 222. When the driven gear 222 is in position, the positioning member 53 is locked in the driven gear 222, fixing the movable ball 22 and fixing the entire mail cabinet in place. The side end limiting structure 60 includes an upper mounting plate 31 and a lower mounting plate 32. The side end limiting structure 60 includes several surface limiting members 61 installed on the upper mounting plate 31. The surface limiting members 61 limit the side of the mail cabinet after it is in position. A bottom limiting member 62 is provided in the lower mounting plate 32. When the bottom limiting member 62 is pushed out, its inner side clamps the outer side of the innermost row of movable balls 22 and slides to the bottom of the mail cabinet, with its top abutting against the back of the mail cabinet.

[0036] During welding, a top-mounted crane is used to move the mail cabinet. The top-mounted crane is suspended on the mail cabinet, allowing the bottom of the mail cabinet to contact the movable ball 22, thereby reducing the friction at the bottom and adjusting the position of the mail cabinet as much as possible.

[0037] In existing welding production lines, either sliding transport or tooling fixation is used, which is either inconvenient for fixing during welding or inconvenient for transfer after welding. Therefore, this utility model, by adding a bottom adjustment and positioning structure 50, firstly changes the traditional design of the movable ball 22, making it a three-section design, so that it can be set to cooperate with the external structure without affecting the turnover effect. When the movable ball 22 transports the mail cabinet to the vicinity of the predetermined position, if the position of the mail cabinet is still slightly off, the entire driven gear 222 can be retracted through the adjustment component 52, so that the movable ball 22 can drive the mail cabinet to move backward or forward, so that the mail cabinet reaches the designated position. This allows the robot with the preset welding trajectory to weld more accurately. After the mail cabinet reaches the designated position, the entire movable ball 22 is fixed by the positioning component 53. Combined with the meshing effect of the adjustment component 52 and the driven gear 222, the mail cabinet is more stable during the welding process and will not slip due to the action of the robot arm.

[0038] During the movement of the movable ball 22, compared to the disordered movement of a traditional ball, if the movement direction of the movable ball 22 is also disordered, it will be difficult to adjust its direction and fix it. Therefore, the guide member 51 in this embodiment includes a mounting plate 511 connected to the upper plate of the transmission frame 10. Two fixing pins 512 are provided below the mounting plate 511. A through hole is opened on the side of the semicircular plate 221 away from the driven gear 222. The fixing pins 512 are inserted into the through hole of the driven gear 222. The movement direction of the movable ball 22 is fixed. The semicircular plate 221 that makes up the movable ball 22 is fixed to the mounting plate 511 by the fixing pins 512, so that the movable ball 22 moves along the rotation direction of the semicircular plate 221, which also happens to match the travel direction of the mail cabinet, thereby facilitating the setting of the adjusting member 52 and the positioning member 53.

[0039] During the movement of the mail cabinet, it comes into contact with the movable ball 22, causing the ball 22 to rotate a corresponding number of times. For example, when the mail cabinet moves from the initial feeding position to the predetermined feeding position, the entire movable ball 22 needs to rotate 35-40 times, meaning the driven gear 222 also needs to rotate 35-40 times. If the driven gear 222 fails to reach the predetermined number of rotations, it will be detected. Therefore, the position information of the mail cabinet is constantly monitored. If the mail cabinet stops before reaching the predetermined position, it needs to be fine-tuned using the adjusting component 52. Specifically, the adjusting component 52 includes a driving gear 521 located below the driven gear 222. A booster assembly 522 is provided below the driving gear 521. A detection structure is provided on the upper plate of the transmission frame 10. The detection structure can measure the number of rotations of each driven gear 222 (e.g., a pulse sensor). When the detection structure detects that the mail cabinet is not in place, it drives the drive gear 521 and the booster component 522 to move upward. The booster component 522 drives the drive gear 521 to rotate, which in turn causes the driven gear 222 to rotate clockwise or counterclockwise. This causes the entire adjusting component 52 to rise and mesh with the stopped driven gear 222, which then drives the driven gear 222 to rotate. This causes the entire movable ball 22 to move the mail cabinet forward or backward, allowing the mail cabinet to reach the designated area. This enables it to cooperate with the welding robot that has been programmed with a pre-set trajectory. The detection structure is an infrared sensor or a position sensor, which can monitor the specific position of the mail cabinet, thus providing a basis for position adjustment.

[0040] During the upward movement of the entire booster assembly 522, it is not possible to push the rotating motor 5221 and the drive gear 521 upwards separately, otherwise it is easy to cause unilateral instability or even breakage of the motor output shaft. Therefore, the booster assembly 522 in this embodiment includes a rotating motor 5221 that passes through the drive gear 521. The output end of the rotating motor 5221 is supported by a support seat 5222. The bottom of the rotating motor 5221 and the support seat 5222 are both connected to a synchronously lifting hydraulic cylinder 5223. All the hydraulic cylinders 5223 are mounted on a base plate. By setting the support seat 5222 at the position of the booster assembly 522 corresponding to the rotating motor 5221, and by synchronously pushing the support seat 5222, the entire upward pushing process becomes more stable and can provide sufficient support and stability during meshing rotation.

[0041] After the mail cabinet reaches the designated position, welding work needs to begin. However, the bottom of the mail cabinet is still in a state of sliding friction at this time, and there is a certain probability of slippage during welding. Therefore, in order to improve welding stability, in this embodiment, the outer side of the drive gear 521 is provided with several alignment holes 2221. Furthermore, the positioning member 53 includes a limiting rod 531 located at the bottom corners on both sides of the driven gear 222. The limiting rod 531 is driven by a limiting cylinder 532. The limiting cylinder 532 is electrically connected to the detection structure. By setting the alignment holes 2221 on the drive gear 521 and setting the limiting rod 531 driven by the limiting cylinder 532 on the positioning member 53, the driving gear 521 is tightly locked by the limiting rod 531, preventing it from sliding. In turn, the driven gear 222 is restricted by the drive gear 521, and all the movable balls 22 with driven gears 222 are fixed, thereby achieving the effect of being able to slide before and after welding and being fixed during welding.

[0042] The drive gear 521 has three alignment holes 2221, which are spaced 120° apart. When the drive gear 521 rotates to the correct number of revolutions, and the mail cabinet reaches the correct position, the opening of one of the alignment holes 2221 will face the mail cabinet, while the other two alignment holes 2221 will face the limit rod 531. When the limit rod 531 is pushed out, the drive gear 521 will be directly limited through the alignment holes 2221, thereby limiting the driven gear 222 meshing with the drive gear 521 and limiting the movable ball 22.

[0043] After the mail cabinet is fixed to the bottom surface, although the cabinet will no longer easily shift due to friction, there is still a certain possibility that it may wobble slightly under the influence of external welding. Therefore, this utility model sets a side limiting structure 60 on the basis of the bottom adjustment and positioning structure 50. The side limiting structure 60 is divided into two parts. One part is for limiting the side of the mail cabinet. That is, when welding a local area or the entire mail cabinet, the side of the mail cabinet can be limited and fixed by different surface limiting parts 61 to reduce the possibility of lateral displacement. The other part is for limiting the bottom of the mail cabinet. After sliding, the bottom limiting part 62, which is limited by the movable ball 22, can contact and rub against the back and bottom surfaces of the mail cabinet, thereby achieving limiting of the bottom, back, and sides of the mail cabinet. That is, except for the side set by the welding robot, all other positions are limited and fixed, achieving the best movable positioning without affecting the welding.

[0044] During the limiting process in the first part, the surface limiting member 61 includes a directional motor 611 disposed on the top of the upper mounting plate 31. The bottom of the directional motor 611 is disposed on a through shaft 612. The through shaft 612 is connected to a blocking page 613. When the blocking page 613 is flipped out, it fits against the mail cabinet. It is rotated by the laterally rotatable directional motor 611. The laterally flipped-out blocking page 613 blocks the side or middle position of the mail cabinet, limiting the local area or both sides, thereby improving the accuracy of all basic positions.

[0045] In the second part of the limiting process, the bottom limiting component 62 includes an electric push rod 621 fixed on the lower mounting plate 32. The electric push rod 621 is provided with a U-shaped top seat 622. The top surface of the U-shaped top seat 622 is provided with a lateral contact block 623. When the electric push rod 621 is pushed out, it inserts the U-shaped top seat 622 into the bottom of the mail cabinet and makes the lateral contact block 623 stick to the back of the mail cabinet. The limiting is achieved by bottom cooperation and lateral direction limitation. It is achieved by the U-shaped top seat 622, which can slide in and out. The U-shaped top seat 622 not only contacts and cooperates with the bottom surface of the mail cabinet, but also clamps the outside of a row of movable balls 22. Furthermore, it contacts the back of the mail cabinet through the lateral contact block 623, thereby forming a three-axis direction limiting, which further stabilizes the entire welding process.

[0046] To ensure the strength and contact friction of the lateral bonding block 623 as much as possible, a reinforcing rib plate 6231 covering the top surface of the U-shaped top seat 622 is connected to the side of the lateral bonding block 623 near the electric push rod 621, and an elastic plate 6232 is connected to the other side of the lateral bonding block 623. The elastic plate 6232 is in contact with the mail cabinet when the electric push rod 621 is pushed out.

[0047] To increase the difficulty of fitting the U-shaped top bracket 622 with the mail cabinet, the end of the U-shaped top bracket 622 that extends into the mail cabinet has an inclined surface.

[0048] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-precision welding structure comprising a transmission frame (10), wherein a transmission guide (20) is provided in the transmission frame (10), the transmission guide (20) includes a mounting plate (21) disposed on the transmission frame (10), wherein a plurality of movable balls (22) are movably mounted in the mounting plate (21), a lateral plate (30) is provided on one side of the transmission frame (10), and a mounting platform (40) is provided on the other side of the transmission frame (10), wherein a welding robot is disposed on the mounting platform (40), characterized in that, Also includes: The bottom adjustment and positioning structure (50) includes a movable ball (22) comprising two semicircular pieces (221) that contact the mail cabinet. A driven gear (222) is connected between the two semicircular pieces (221), and the outer diameter of the driven gear (222) is equal to the outer diameter of the semicircular pieces (221). The bottom adjustment and positioning structure (50) includes a guide (51) disposed outside the two semicircular pieces (221), and the semicircular pieces (221) move in the direction of the mail cabinet under the guidance of the guide (51). When rotated, the driven gear (222) has an adjusting member (52) at its bottom. After the adjusting member (52) moves upward, it drives the driven gear (222) to reverse, causing the movable ball (22) to return the mail cabinet to the predetermined position. The driven gear (222) has a positioning member (53) on its side. When the driven gear (222) is in position, the positioning member (53) is locked in the driven gear (222), fixing the movable ball (22) and fixing the entire mail cabinet in place.

2. The high-precision welding structure according to claim 1, characterized in that, The guide (51) includes a mounting plate (511) connected to the upper plate of the transmission frame (10). Two fixing pins (512) are provided below the mounting plate (511). A through hole is provided on the side of the semicircular piece (221) away from the driven gear (222). The fixing pins (512) are inserted into the through hole of the driven gear (222).

3. The high-precision welding structure according to claim 1, characterized in that, The adjusting member (52) includes a driving gear (521) located below the driven gear (222). A booster assembly (522) is provided below the driving gear (521). A detection structure is provided on the upper plate of the transmission frame (10). When the detection structure detects that the mail cabinet is not in place, it drives the driving gear (521) and the booster assembly (522) to move upward. The booster assembly (522) drives the driving gear (521) to rotate, thereby causing the driven gear (222) to rotate clockwise or counterclockwise.

4. A high-precision welding structure according to claim 3, characterized in that, The booster assembly (522) includes a rotating motor (5221) that passes through the drive gear (521). The output end of the rotating motor (5221) is supported by a support base (5222). The bottom of the rotating motor (5221) and the support base (5222) are both connected to a synchronously lifting hydraulic cylinder (5223). All the hydraulic cylinders (5223) are mounted on a base plate.

5. A high-precision welding structure according to claim 4, characterized in that, The outer side of the drive gear (521) is provided with several alignment holes (2221).

6. A high-precision welding structure according to claim 1, characterized in that, The positioning component (53) includes a limiting rod (531) located at the bottom corners on both sides of the driven gear (222). The limiting rod (531) is driven by a limiting cylinder (532), which is electrically connected to the detection structure.

Images