A mail cabinet welding line

Abstract

The present invention discloses a mail cabinet welding production line, comprising a transmission frame, a transmission guide, a mounting frame plate, a movable ball, a side plate, a mounting platform, and a welding robot, and also comprises: a bottom adjustment and positioning structure, the bottom adjustment and positioning structure comprises a guide, an adjusting member, and a positioning member; a side end limiting structure, the side end limiting structure comprises a plurality of surface limiting members, the surface limiting members limit the side of the mail cabinet flipped to the mail cabinet after the mail cabinet is in place, a bottom limiting member is arranged in the lower mounting plate, and when the bottom limiting member is pushed out, the inner side is clamped on the outer side of the innermost row of movable balls and slides to the bottom of the mail cabinet and the top abuts against the back side of the mail cabinet. The present invention can perform welding at a precisely predetermined position during welding, thereby ensuring the strength and aesthetics of the cabinet body.

Description

Technical Field

[0001] The invention relates to a welding production line, in particular to a mail cabinet welding production line. Background Art

[0002] Mail lockers are mainly used to store and manage mail, letters and small parcels. They are services provided by post offices or property management companies. They are usually designed as larger cabinets that can accommodate letters and parcels of different sizes. Mail lockers are generally shipped in batches, and there are rarely single-piece orders. Therefore, during welding processing, they are welded in an assembly line manner, with different units welded at different positions to improve the overall production line.

[0003] Traditionally, mail cabinets are hoisted by cranes during welding, and the mail cabinets are transferred to various workstations by cranes. Although the heavy mail cabinets can be hoisted, they still need to be manually guided and corrected when they are placed. Therefore, the prior art sets guide wheels on the racks of the entire production line, places the mail cabinets on the guide wheels, drives the mail cabinets forward by the translation of the crane, and then moves the mail wheels forward along the guide wheels to complete the switching of workstations. This method allows the industry to move the cabinet body without longitudinal movement, but since the parameters set by the welding manipulator are constant, although this mobile placement is used to achieve horizontal lateral movement, it cannot form an effective fixation during welding, and is prone to unilateral offset during welding, which in turn slows down the overall welding progress.

[0004] Therefore, this case aims to provide a mail cabinet welding production line, which can not only assist the mail cabinet to slide to the corresponding area through the sliding ball, but also can be fixed after the cabinet is in place after fine-tuning the position, so that welding can be performed accurately at the predetermined position during welding, thereby ensuring the strength and aesthetics of the cabinet. Summary of the invention

[0005] The present invention provides a mail cabinet welding production line, which can effectively solve the above problems.

[0006] The present invention is achieved in that:

[0007] A mail cabinet welding production line comprises a transmission frame, wherein a transmission guide is arranged in the transmission frame, wherein the transmission guide comprises a mounting frame plate arranged on the transmission frame, wherein a plurality of movable balls are movably mounted in the mounting frame plate, wherein a side plate is arranged on one side of the transmission frame, and a mounting platform is arranged on the other side of the transmission frame, wherein a welding robot is arranged on the mounting platform, wherein the mail cabinet welding production line further comprises:

[0008] The bottom adjustment positioning structure, the movable ball includes two semicircular pieces in contact with the mail cabinet, a driven gear is connected between the two semicircular pieces, the outer diameter of the driven gear is equal to the outer diameter of the semicircular pieces, the bottom adjustment positioning structure includes a guide member arranged outside the two semicircular pieces, the semicircular pieces rotate in the direction of movement of the mail cabinet under the guidance of the guide member, and an adjusting member is arranged at the bottom of the driven gear;

[0009] The adjusting member comprises a driving gear located below the driven gear, a boosting assembly is arranged below the driving gear, and a detection structure is arranged on the upper plate of the transmission frame. When the detection structure detects that the mail cabinet is not in place, the driving gear and the boosting assembly are driven upward, and the boosting assembly drives the driving gear to rotate so as to make the driven gear rotate clockwise or counterclockwise;

[0010] After the adjusting member moves upward, it drives the driven gear to reverse, so that the movable ball returns the mail cabinet to a predetermined position. A positioning member is arranged on the side of the driven gear. When the driving gear is in place, the positioning member is clamped in the driving gear to fix the movable ball, so that the entire mail cabinet is fixed in place;

[0011] A side limit structure, wherein the side plate includes an upper mounting plate and a lower mounting plate, and the side limit structure includes a plurality of surface limit members mounted on the upper mounting plate, and the surface limit members limit the side of the mail cabinet that is flipped over after the mail cabinet is in place, and a bottom limit member is arranged in the lower mounting plate, and when the bottom limit member is pushed out, the inner side is clamped on the outer side of the innermost row of movable balls and slides to the bottom of the mail cabinet and the top abuts against the back of the mail cabinet.

[0012] As a further improvement, the guide member includes a mounting plate connected to the upper plate of the transmission frame, two fixing pins are arranged below the mounting plate, a through hole is opened on the side of the semicircular piece away from the driven gear, and the fixing pin is inserted into the through hole of the driven gear.

[0013] As a further improvement, the adjusting member includes a driving gear located below the driven gear, a booster assembly is provided below the driving gear, and 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, the driving gear and the booster assembly are driven upward, and the booster assembly drives the driving gear to rotate and then the driven gear rotates clockwise or counterclockwise.

[0014] As a further improvement, the booster assembly includes a rotating motor that passes through the driving gear, the output end of the rotating motor is supported by a support seat, the bottom of the rotating motor and the support seat are connected to a synchronously lifting hydraulic cylinder, and all the hydraulic cylinders are installed on a base plate.

[0015] As a further improvement, a plurality of alignment holes are provided on the outer side of the driving gear.

[0016] As a further improvement, the positioning member includes limiting rods located at the bottom corners on both sides of the driven gear, and the limiting rods are driven by a limiting oil cylinder, and the limiting oil cylinder is electrically connected to the detection structure.

[0017] As a further improvement, the surface limiter includes an adjustment motor arranged on the top of the upper mounting plate, the bottom of the adjustment motor is arranged on a through shaft, the through shaft is connected to a blocking page, and the blocking page is attached to the mail cabinet when flipped out.

[0018] As a further improvement, the bottom limit member includes an electric push rod fixed on the lower mounting plate, the electric push rod is provided with a U-shaped top seat, the top surface of the U-shaped top seat is provided with a side fitting block, and when the electric push rod is pushed out, the U-shaped top seat is inserted into the bottom of the mail cabinet and the side fitting block is attached to the back of the mail cabinet.

[0019] As a further improvement, the side of the lateral fitting block close to the electric push rod is connected to a reinforcing rib covering the top surface of the U-shaped top seat, and the other side of the lateral fitting block is connected to an elastic plate, and the elastic plate fits with the mail cabinet when the electric push rod is pushed out.

[0020] As a further improvement, the end of the U-shaped top seat extending into the mail cabinet has an inclined surface.

[0021] The beneficial effects of the present invention are:

[0022] In the existing welding lines, either a sliding transportation method or a tooling fixing method is adopted, which is either inconvenient to fix during welding or inconvenient to transport after welding. Therefore, the present invention changes the design of the traditional movable ball by adding a bottom adjustment and positioning structure, and makes the movable ball a three-stage design, so that it can be set to cooperate with the external structure 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 deviated, the entire driven gear can be called back through the adjustment member, and then the movable ball can drive the mail cabinet back or forward to make the mail cabinet reach the specified position, so that the robot with a preset welding trajectory can weld more accurately, and after the mail cabinet reaches the specified position, the entire movable ball is fixed by the positioning member, and the meshing effect of the adjustment member and the driven gear is matched, so that the mail cabinet can be more stable during the welding process and will not slide due to the action of the manipulator.

[0023] During the movement of the movable ball, compared with the disordered movement of the traditional ball, if the movement direction of the movable ball is also disordered, it will be difficult to adjust and fix it. Therefore, the movement direction of the movable ball of the present invention is fixed, and the semicircular pieces that constitute the movable ball are fixed on the mounting plate by fixing pins, so that the movable ball moves along the direction of rotation of the semicircular pieces, which also happens to adapt to the travel direction of the mail cabinet, thereby facilitating the setting of the adjustment part and the positioning part.

[0024] During the movement of the mail cabinet, since it is in contact with the movable ball, the movable ball will rotate a corresponding number of circles, so the position information of the mail cabinet is always under monitoring. When the mail cabinet stops without reaching the predetermined position, it is necessary to fine-tune the adjustment part so that the entire adjustment part rises and meshes with the stopped driven gear, and then drives the driven gear to rotate, thereby making the entire movable ball drive the mail cabinet forward or backward, so that the mail cabinet reaches the designated area, so that it can cooperate with the welding robot with a set trajectory.

[0025] During the upward process, the entire booster assembly cannot only push up the rotating motor and the driving gear separately, otherwise it will easily cause unilateral instability or even breakage of the motor output shaft. Therefore, the present invention sets a support seat at the position of the booster assembly corresponding to the rotating motor, and synchronously pushes the support seat to make the entire pushing process smoother, and can provide sufficient support and stabilizing force during meshing rotation.

[0026] 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. There is a certain probability of sliding during welding. Therefore, in order to improve the welding stability, the present invention provides an alignment hole on the active gear and a limit rod driven by a limit cylinder on the positioning member. The active gear is tightly clamped by the limit rod to prevent it from sliding. The driven gear is then limited by the active gear, so that all movable balls with the driven gear are fixed, thereby achieving the effect of being able to slide before and after welding and being able to be fixed during welding.

[0027] After the mail cabinet and the bottom end surface are fixed, although the cabinet body will not be easily displaced due to the effect of friction, there is still a certain possibility that the friction will be overcome and a little shaking will occur under the effect of external welding. Therefore, the present invention sets a side end limiting structure on the basis of the bottom adjustment and positioning structure. The side end limiting structure is divided into two parts of limiting, one of which is the limiting of the side of the mail cabinet, that is, when welding a local area of ​​the mail cabinet or welding the whole area, the side of the mail cabinet can be limited and fixed by different surface limiting members to reduce the possibility of lateral displacement, and the other part is to limit the bottom side of the mail cabinet. After sliding, the bottom limiting member limited by the movable ball can contact and rub the back and bottom surface of the mail cabinet body, thereby realizing the limiting of the bottom, back and side of the mail cabinet, that is, except for the side where the welding robot is set, there is no limit, and the other positions are all limited and fixed, so as to achieve the best movable positioning without affecting welding.

[0028] In the first part of the limiting process, the side or middle position of the mail cabinet is blocked by the laterally rotatable direction adjustment motor, and the local area or the two side areas are limited, thereby improving the precision of all basic positions.

[0029] In the limiting process of the second part, the limiting is achieved through the bottom cooperating with the two side directions, which is achieved through a U-shaped top seat that can slide in and out. The U-shaped top seat not only contacts and cooperates with the bottom surface of the mail cabinet, but is also clamped on the outside of a row of movable balls. It further contacts the back of the mail cabinet through the lateral bonding block, thereby forming a three-axis limit, further stabilizing the entire welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0032] Figure 2 It is a schematic diagram of the top structure of the present invention.

[0033] Figure 3 It is a front view structural schematic diagram of the present invention.

[0034] Figure 4 It is a three-dimensional structural schematic diagram of the present invention (single station).

[0035] Figure 5 The present invention Figure 4 Magnified view of area A.

[0036] Figure 6 The present invention Figure 4 Schematic diagram of the structure from another angle.

[0037] Figure 7 The present invention Figure 6 Magnified view of area B.

[0038] Figure 8 It is a structural schematic diagram of the side end limiting structure of the present invention.

[0039] Fig. 9 It is a structural schematic diagram of the bottom adjustment and positioning structure of the present invention.

[0040] Fig.10 The present invention Fig. 9 Schematic diagram of the front view structure.

[0041] Fig.11 It is a schematic diagram of the structure of the alignment hole in the driving gear of the present invention (normal position).

[0042] Fig.12 It is a structural schematic diagram of the alignment hole in the driving gear of the present invention (misaligned state).

[0043] Fig.13 It is a structural schematic diagram of the bottom limiter of the present invention.

[0044] In the figure:

[0045] Transmission frame 10, transmission guide 20, mounting frame plate 21, movable ball 22, semicircular piece 221, driven gear 222, alignment hole 2221, lateral plate 30, upper mounting plate 31, lower mounting plate 32, mounting platform 40, bottom adjustment positioning structure 50, guide 51, mounting plate 511, fixing pin 512, adjusting member 52, driving gear 521, boosting assembly 522, rotating motor 5221, supporting seat 5222, hydraulic cylinder 5223, positioning member 53, limiting rod 531, limiting cylinder 532, side end limiting structure 60, surface limiting member 61, direction adjustment motor 611, through shaft 612, blocking page 613, bottom limiting member 62, electric push rod 621, U-shaped top seat 622, lateral fitting block 623, reinforcing rib 6231, elastic plate 6232. DETAILED DESCRIPTION

[0046] In order to make the embodiments of the present invention, all belong to the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0047] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as referring to the purpose, technical solutions and advantages of the methods. To be more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work indicate or imply relative importance or implicitly indicate the number of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0048] Reference Figures 1 to 13As shown, a mail cabinet welding production line includes a transmission frame 10, wherein the transmission frame 10 is provided with a transmission guide 20, wherein the transmission guide 20 includes a mounting frame plate 21 disposed on the transmission frame 10, wherein a plurality of movable balls 22 are movably mounted in the mounting frame plate 21, wherein a side plate 30 is disposed on one side of the transmission frame 10, wherein a mounting platform 40 is disposed on the other side of the transmission frame 10, wherein a welding robot is disposed on the mounting platform 40, wherein the mail cabinet welding production line further includes: a bottom adjustment positioning structure 50, wherein the movable ball 22 includes two movable balls 22 in contact with the mail cabinet A semicircular piece 221 is provided, and 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 piece 221. The bottom adjustment and positioning structure 50 includes a guide member 51 arranged on the outside of the two semicircular pieces 221. The semicircular piece 221 rotates in the direction of movement of the mail cabinet under the guidance of the guide member 51. An adjusting member 52 is provided at the bottom of the driven gear 222. 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 transport rack 10. When the detection structure detects that the mail cabinet is not in place, the driving gear 521 and the booster assembly 522 are driven upward, and the booster assembly 522 drives the driving gear 521 to rotate, thereby causing the driven gear 222 to rotate clockwise or counterclockwise; after the adjusting member 52 moves upward, it drives the driven gear 222 to reverse, so that the movable ball 22 returns the mail cabinet to a predetermined position. A positioning member 53 is provided on the side of the driven gear 222. When the driving gear 521 is in place, the positioning member 53 is clamped on the driving gear 521. In the embodiment, the movable ball 22 is fixed so that the entire mail cabinet is fixed in place; the side end limiting structure 60, the side plate 30 includes an upper mounting plate 31 and a lower mounting plate 32, the side end limiting structure 60 includes a plurality of surface limiting members 61 installed on the upper mounting plate 31, the surface limiting members 61 limit the side of the mail cabinet when it is in place, and the lower mounting plate 32 is provided with a bottom limiting member 62, and when the bottom limiting member 62 is pushed out, the inner side is clamped on the outer side of the innermost row of movable balls 22 and slides to the bottom of the mail cabinet and the top abuts against the back of the mail cabinet.

[0049] During welding, the top crane is used to move the mail cabinet, which is hung on the mail cabinet so that the bottom of the mail cabinet contacts the movable ball 22, thereby reducing the friction at the bottom and adjusting the position of the mail cabinet as much as possible.

[0050] In the existing welding production lines, either a sliding transportation method or a tooling fixing method is adopted, which is either inconvenient to fix during welding or inconvenient to transport after welding. Therefore, the present invention, through the additional bottom adjustment and positioning structure 50, firstly, changes the design of the traditional movable ball 22, and makes the movable ball 22 a three-stage 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 deviated, the entire driven gear 222 can be called back through the adjustment member 52, and then the movable ball 22 drives the mail cabinet to retreat or move forward, so that the mail cabinet reaches the designated position, so that the robot with a preset welding trajectory can weld more accurately, and after the mail cabinet reaches the designated position, the entire movable ball 22 is fixed by the positioning member 53, and the meshing effect of the adjusting member 52 and the driven gear 222 is matched, so that the mail cabinet can be more stable during the welding process and will not slide due to the action of the robot.

[0051] During the movement of the movable ball 22, compared with the disordered movement of the traditional sphere, if the movement direction of the movable ball 22 is also disordered, it will be unfavorable for its adjustment and fixation. Therefore, the guide member 51 of this embodiment includes a mounting plate 511 connected to the upper plate of the transmission frame 10, and two fixing pins 512 are arranged under the mounting plate 511. A through hole is opened on the side of the semicircular piece 221 away from the driven gear 222, and the fixing pin 512 is inserted into the through hole of the driven gear 222, wherein the movement direction of the movable ball 22 is fixed, and the semicircular piece 221 constituting the movable ball 22 is fixed on the mounting plate 511 by the fixing pin 512, so that the movable ball 22 moves along the direction of rotation of the semicircular piece 221, which also happens to adapt to the travel direction of the mail cabinet, thereby facilitating the setting of the adjustment member 52 and the positioning member 53.

[0052] During the movement of the mail cabinet, since it is in contact with the movable ball 22, the movable ball 22 will rotate a corresponding number of circles. 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 to 40 circles, that is, the driven gear 222 also needs to rotate 35 to 40 circles. When the driven gear 222 does not reach the fixed number of circles, it will be detected. Therefore, the position information of the mail cabinet is always under monitoring. When the mail cabinet stops before reaching the predetermined position, it is necessary to fine-tune it through the adjustment member 52. Specifically, the adjustment member 52 includes a driving gear 521 located below the driven gear 222, and a booster assembly 522 is arranged below the driving gear 521. A detection structure is arranged on the upper plate of the transmission frame 10. The detection structure The number of revolutions of each driven gear 222 can be measured (for example, a pulse sensor). When the detection structure detects that the mail cabinet is not in place, the driving gear 521 and the booster assembly 522 are driven upward, and the booster assembly 522 drives the driving gear 521 to rotate, thereby allowing the driven gear 222 to rotate clockwise or counterclockwise, so that the entire adjustment member 52 rises and meshes with the stopped driven gear 222, and then drives the driven gear 222 to rotate, thereby allowing the entire movable ball 22 to drive the mail cabinet forward or backward, so that the mail cabinet reaches the designated area, so that it can cooperate with the welding robot with a set trajectory. The detection structure is an infrared sensor or a position sensor, which can monitor the specific position of the mail cabinet, thereby providing a basis for position adjustment.

[0053] During the upward process, the entire booster assembly 522 cannot only push up the rotating motor 5221 and the driving gear 521, otherwise it will easily cause unilateral instability or even breakage of the motor output shaft. Therefore, the booster assembly 522 of this embodiment includes a rotating motor 5221 that passes through the driving gear 521, and 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, and all of the hydraulic cylinders 5223 are installed on a base plate. By arranging a 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 pushing process becomes smoother, and sufficient support and stability can be provided during meshing rotation.

[0054] After the mail cabinet reaches the designated position, welding work needs to be started. However, the bottom of the mail cabinet is still in a state of sliding friction at this time. There is a certain probability of sliding during welding. Therefore, in order to improve the welding stability, in this embodiment, a plurality of alignment holes 2221 are opened on the outer side of the driving gear 521. 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 oil cylinder 532. The limiting oil cylinder 532 is electrically connected to the detection structure. By providing the alignment hole 2221 on the driving gear 521 and providing the limiting rod 531 driven by the limiting oil cylinder 532 on the positioning member 53, the driving gear 521 is tightly clamped by the limiting rod 531 so that it cannot slide. Then, the driven gear 222 is limited by the driving gear 521, so that all the movable balls 22 with the driven gear 222 are fixed, thereby achieving the effect of being able to slide before and after welding and being able to be fixed during welding.

[0055] There are three alignment holes 2221 on the driving gear 521, and each alignment hole 2221 is spaced 120 degrees apart. When the driving gear 521 rotates to the correct number of circles and the mail cabinet reaches the correct position, the opening of one of the alignment holes 2221 of the driving gear 521 will face the mail cabinet, while the other two alignment holes 2221 will face the limiting rod 531. At this time, the limiting rod 531 is pushed out, and the driving gear 521 is directly limited through the alignment hole 2221, thereby limiting the driven gear 222 meshing with the driving gear 521 and limiting the movable ball 22.

[0056] After the mail cabinet and the bottom end surface are fixed, although the cabinet body will not be easily displaced due to the effect of friction, there is still a certain possibility that the friction will be overcome and a little shaking will occur under the effect of external welding. Therefore, the present invention sets a side end limiting structure 60 on the basis of the bottom adjustment and positioning structure 50. The side end limiting structure 60 is divided into two parts of limiting, one of which is for limiting the side of the mail cabinet, that is, when welding a local area of ​​the mail cabinet or welding the whole area, the side of the mail cabinet can be limited and fixed by different surface limiting members 61 to reduce the possibility of lateral displacement, and the other part is for limiting the bottom side of the mail cabinet. After sliding, the bottom limiting member 62 limited by the movable ball 22 can contact and rub the back and bottom surface of the mail cabinet body, thereby realizing the limiting of the bottom, back and side of the mail cabinet, that is, except for the side set by the welding robot, there is no limit, and the other positions are all limited and fixed, so as to achieve the best movable positioning without affecting welding.

[0057] In the limiting process of the first part, the surface limiting member 61 includes an adjustment motor 611 arranged on the top of the upper mounting plate 31, and the bottom of the adjustment motor 611 is arranged on a through shaft 612, and the through shaft 612 is connected to a blocking page 613. When the blocking page 613 is flipped out, it fits on the mail cabinet and is rotated by the laterally rotatable adjustment motor 611. The side or middle position of the mail cabinet is blocked by the laterally flippable blocking page 613, and the local area or the two side areas are limited, thereby improving the precision effect of all basic positions.

[0058] In the limiting process of the second part, the bottom limiting member 62 includes an electric push rod 621 fixed on the lower mounting plate 32, and a U-shaped top seat 622 is arranged on the electric push rod 621, and a lateral bonding block 623 is arranged on the top surface of the U-shaped top seat 622. When the electric push rod 621 is pushed out, the U-shaped top seat 622 is inserted into the bottom of the mail cabinet and the lateral bonding block 623 is attached to the back of the mail cabinet. The limiting is achieved by coordinating the bottom with the two side directions, and it is achieved by the U-shaped top seat 622 that 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 is also clamped on the outside of a row of movable balls 22, and further contacts with the back of the mail cabinet through the lateral bonding block 623, thereby forming a three-axis limit, further stabilizing the entire welding process.

[0059] In order to ensure the strength and contact friction of the lateral laminating block 623 as much as possible, the side of the lateral laminating block 623 close to the electric push rod 621 is connected to a reinforcing rib 6231 covering the top surface of the U-shaped top seat 622, and the other side of the lateral laminating block 623 is connected to an elastic plate 6232, and the elastic plate 6232 is in contact with the mail cabinet when the electric push rod 621 is pushed out.

[0060] In order to improve the matching difficulty between the U-shaped top seat 622 and the mail cabinet, the end of the U-shaped top seat 622 extending into the mail cabinet has an inclined surface.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mail box welding production line, comprising a transmission frame (10), wherein a transmission guide (20) is arranged in the transmission frame (10), wherein the transmission guide (20) comprises a mounting frame plate (21) arranged on the transmission frame (10), wherein a plurality of movable balls (22) are movably mounted in the mounting frame plate (21), wherein a side plate (30) is arranged on one side of the transmission frame (10), and a mounting platform (40) is arranged on the other side of the transmission frame (10), wherein a welding robot is arranged on the mounting platform (40), wherein the welding robot is arranged on the mounting platform (40), wherein the welding robot is arranged on the mounting frame (40), wherein the welding robot is arranged on the mounting frame (40), wherein the welding robot is arranged on the mounting frame (21 ... The mail cabinet welding line also includes: The bottom adjustment positioning structure (50) comprises two semicircular pieces (221) in contact with 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 piece (221), the bottom adjustment positioning structure (50) comprises a guide member (51) arranged outside the two semicircular pieces (221), the semicircular piece (221) rotates in the direction of movement of the mail cabinet under the guidance of the guide member (51), and the bottom of the driven gear (222) is provided with a guide member (51) arranged outside the two semicircular pieces (221). An adjusting member (52) is provided, the adjusting member (52) comprising a driving gear (521) located below the driven gear (222), a boosting assembly (522) being provided below the driving gear (521), a detection structure being provided on the upper plate of the transmission frame (10), and when the detection structure detects that the mail cabinet is not in place, the driving gear (521) and the boosting assembly (522) are driven upward, and the boosting assembly (522) drives the driving gear (521) to rotate, thereby causing the driven gear (222) to rotate clockwise or counterclockwise; After the adjusting member (52) moves upward, it drives the driven gear (222) to rotate in the reverse direction, so that the movable ball (22) returns the mail cabinet to a predetermined position. A positioning member (53) is arranged on the side of the driven gear (222). When the driving gear (521) is in place, the positioning member (53) is clamped in the driving gear (521) to fix the movable ball (22), so that the entire mail cabinet is fixed in place. A side end limiting structure (60), wherein the side plate (30) comprises an upper mounting plate (31) and a lower mounting plate (32), wherein the side end limiting structure (60) comprises a plurality of surface limiting members (61) mounted on the upper mounting plate (31), wherein the surface limiting members (61) limit the side of the mail cabinet when the mail cabinet is in place, and wherein a bottom limiting member (62) is arranged in the lower mounting plate (32), wherein when the bottom limiting member (62) is pushed out, the inner side is clamped on the outer side of the innermost row of movable balls (22) and slides to the bottom of the mail cabinet, and the top abuts against the back of the mail cabinet.

2. A mail cabinet welding production line according to claim 1, characterized in that: The guide member (51) comprises a mounting plate (511) connected to an upper plate of a transmission frame (10), two fixing pins (512) are arranged below the mounting plate (511), a through hole is provided on a side of the semicircular sheet (221) away from the driven gear (222), and the fixing pins (512) are inserted into the through hole of the driven gear (222).

3. A mail cabinet welding production line according to claim 1, characterized in that: The boosting assembly (522) comprises a rotating motor (5221) penetrating the driving gear (521); the output end of the rotating motor (5221) is supported by a supporting seat (5222); the bottom of the rotating motor (5221) and the supporting seat (5222) are both connected to a synchronously lifting hydraulic cylinder (5223); and all the hydraulic cylinders (5223) are mounted on a base plate.

4. A mail cabinet welding production line according to claim 3, characterized in that: A plurality of alignment holes (2221) are provided on the outer side of the driving gear (521).

5. A mail box welding line according to claim 4, characterized in that: The positioning member (53) comprises limiting rods (531) located at the bottom corners on both sides of the driven gear (222); the limiting rods (531) are driven by a limiting oil cylinder (532); and the limiting oil cylinder (532) is electrically connected to the detection structure.

6. A mail box welding production line according to claim 1, characterized in that: The surface limiting member (61) comprises an adjustment motor (611) arranged on the top of the upper mounting plate (31); the bottom of the adjustment motor (611) is arranged on a through shaft (612); the through shaft (612) is connected to a blocking page (613); and the blocking page (613) is attached to the mail cabinet when turned out.

7. A mail box welding production line according to claim 6, characterized in that: The bottom stopper (62) comprises an electric push rod (621) fixed on the lower mounting plate (32); a U-shaped top seat (622) is arranged on the electric push rod (621); a lateral bonding block (623) is arranged on the top surface of the U-shaped top seat (622); when the electric push rod (621) is pushed out, the U-shaped top seat (622) is inserted into the bottom of the mail cabinet and the lateral bonding block (623) is bonded to the back of the mail cabinet.

8. A mail box welding line according to claim 7, characterized in that: A reinforcing rib plate (6231) covering the top surface of the U-shaped top seat (622) is connected to one side of the lateral fitting block (623) close to the electric push rod (621), and an elastic plate (6232) is connected to the other side of the lateral fitting block (623). The elastic plate (6232) fits with the mail cabinet when the electric push rod (621) is pushed out.

9. A mail cabinet welding production line according to claim 8, characterized in that: The end of the U-shaped top seat (622) extending into the mail cabinet has an inclined surface.

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